diff --git a/packages/server-nest/src/main.ts b/packages/server-nest/src/main.ts
index 7c411ec8f..78d305afe 100644
--- a/packages/server-nest/src/main.ts
+++ b/packages/server-nest/src/main.ts
@@ -1,7 +1,8 @@
 import { NestFactory } from '@nestjs/core';
 import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
-import { AppModule } from './modules/App/App.module';
 import { ClsMiddleware } from 'nestjs-cls';
+import { AppModule } from './modules/App/App.module';
+import './utils/moment-mysql';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
diff --git a/packages/server-nest/src/modules/App/App.module.ts b/packages/server-nest/src/modules/App/App.module.ts
index 0a027cba7..65523f431 100644
--- a/packages/server-nest/src/modules/App/App.module.ts
+++ b/packages/server-nest/src/modules/App/App.module.ts
@@ -33,6 +33,7 @@ import { TransformerInjectable } from '../Transformer/TransformerInjectable.serv
 import { TransformerModule } from '../Transformer/Transformer.module';
 import { AccountsModule } from '../Accounts/Accounts.module';
 import { ExpensesModule } from '../Expenses/Expenses.module';
+import { ItemCategoryModule } from '../ItemCategories/ItemCategory.module';
 
 @Module({
   imports: [
@@ -87,6 +88,7 @@ import { ExpensesModule } from '../Expenses/Expenses.module';
     TenancyDatabaseModule,
     TenancyModelsModule,
     ItemsModule,
+    ItemCategoryModule,
     AccountsModule,
     ExpensesModule,
   ],
@@ -106,7 +108,6 @@ import { ExpensesModule } from '../Expenses/Expenses.module';
     },
     AppService,
     JwtStrategy,
-    
   ],
 })
 export class AppModule {
diff --git a/packages/server-nest/src/modules/Expenses/Expenses.module.ts b/packages/server-nest/src/modules/Expenses/Expenses.module.ts
index 8881d152b..cc11874c6 100644
--- a/packages/server-nest/src/modules/Expenses/Expenses.module.ts
+++ b/packages/server-nest/src/modules/Expenses/Expenses.module.ts
@@ -6,17 +6,25 @@ import { PublishExpense } from './commands/PublishExpense.service';
 import { ExpensesController } from './Expenses.controller';
 import { ExpensesApplication } from './ExpensesApplication.service';
 import { GetExpenseService } from './queries/GetExpense.service';
+import { ExpenseDTOTransformer } from './commands/CommandExpenseDTO.transformer';
+import { CommandExpenseValidator } from './commands/CommandExpenseValidator.service';
+import { TenancyContext } from '../Tenancy/TenancyContext.service';
+import { TransformerInjectable } from '../Transformer/TransformerInjectable.service';
 
 @Module({
   imports: [],
   controllers: [ExpensesController],
   providers: [
     CreateExpense,
+    ExpenseDTOTransformer,
+    CommandExpenseValidator,
     EditExpense,
     DeleteExpense,
     PublishExpense,
     GetExpenseService,
     ExpensesApplication,
+    TenancyContext,
+    TransformerInjectable
   ],
 })
 export class ExpensesModule {}
diff --git a/packages/server-nest/src/modules/Expenses/commands/ExpenseDTOTransformer.ts b/packages/server-nest/src/modules/Expenses/commands/CommandExpenseDTO.transformer.ts
similarity index 97%
rename from packages/server-nest/src/modules/Expenses/commands/ExpenseDTOTransformer.ts
rename to packages/server-nest/src/modules/Expenses/commands/CommandExpenseDTO.transformer.ts
index 9ebd61635..2d5785b7b 100644
--- a/packages/server-nest/src/modules/Expenses/commands/ExpenseDTOTransformer.ts
+++ b/packages/server-nest/src/modules/Expenses/commands/CommandExpenseDTO.transformer.ts
@@ -7,7 +7,6 @@ import {
   IExpenseEditDTO,
 } from '../interfaces/Expenses.interface';
 // import { BranchTransactionDTOTransform } from '@/services/Branches/Integrations/BranchTransactionDTOTransform';
-// import { TenantMetadata } from '@/system/models';
 import { Injectable } from '@nestjs/common';
 import { Expense } from '../models/Expense.model';
 import { assocItemEntriesDefaultIndex } from '@/utils/associate-item-entries-index';
@@ -86,7 +85,7 @@ export class ExpenseDTOTransformer {
    */
   public expenseCreateDTO = async (
     expenseDTO: IExpenseCreateDTO,
-  ): Promise<Expense> => {
+  ): Promise<Partial<Expense>> => {
     const initialDTO = this.expenseDTOToModel(expenseDTO);
     const tenant = await this.tenancyContext.getTenant(true);
 
diff --git a/packages/server-nest/src/modules/Expenses/commands/CreateExpense.service.ts b/packages/server-nest/src/modules/Expenses/commands/CreateExpense.service.ts
index 1df82ae1d..8283e9387 100644
--- a/packages/server-nest/src/modules/Expenses/commands/CreateExpense.service.ts
+++ b/packages/server-nest/src/modules/Expenses/commands/CreateExpense.service.ts
@@ -6,7 +6,7 @@ import {
   IExpenseCreatingPayload,
 } from '../interfaces/Expenses.interface';
 import { CommandExpenseValidator } from './CommandExpenseValidator.service';
-import { ExpenseDTOTransformer } from './ExpenseDTOTransformer';
+import { ExpenseDTOTransformer } from './CommandExpenseDTO.transformer';
 import { Account } from '@/modules/Accounts/models/Account.model';
 import { Expense } from '@/modules/Expenses/models/Expense.model';
 import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
diff --git a/packages/server-nest/src/modules/Expenses/commands/EditExpense.service.ts b/packages/server-nest/src/modules/Expenses/commands/EditExpense.service.ts
index 2c308fc25..5232b8ace 100644
--- a/packages/server-nest/src/modules/Expenses/commands/EditExpense.service.ts
+++ b/packages/server-nest/src/modules/Expenses/commands/EditExpense.service.ts
@@ -7,7 +7,7 @@ import {
 } from '../interfaces/Expenses.interface';
 import { CommandExpenseValidator } from './CommandExpenseValidator.service';
 import { EventEmitter2 } from '@nestjs/event-emitter';
-import { ExpenseDTOTransformer } from './ExpenseDTOTransformer';
+import { ExpenseDTOTransformer } from './CommandExpenseDTO.transformer';
 // import { EntriesService } from '@/services/Entries';
 import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
 import { Account } from '@/modules/Accounts/models/Account.model';
diff --git a/packages/server-nest/src/modules/ItemCategories/ItemCategory.application.ts b/packages/server-nest/src/modules/ItemCategories/ItemCategory.application.ts
index 83430aea3..3b8a26e17 100644
--- a/packages/server-nest/src/modules/ItemCategories/ItemCategory.application.ts
+++ b/packages/server-nest/src/modules/ItemCategories/ItemCategory.application.ts
@@ -1,9 +1,11 @@
+import { Injectable } from '@nestjs/common';
 import { IItemCategoryOTD } from './ItemCategory.interfaces';
 import { CreateItemCategoryService } from './commands/CreateItemCategory.service';
 import { DeleteItemCategoryService } from './commands/DeleteItemCategory.service';
 import { EditItemCategoryService } from './commands/EditItemCategory.service';
 import { GetItemCategoryService } from './queries/GetItemCategory.service';
 
+@Injectable()
 export class ItemCategoryApplication {
   constructor(
     private readonly createItemCategoryService: CreateItemCategoryService,
diff --git a/packages/server-nest/src/modules/ItemCategories/ItemCategory.controller.ts b/packages/server-nest/src/modules/ItemCategories/ItemCategory.controller.ts
index be4d929e9..805f65727 100644
--- a/packages/server-nest/src/modules/ItemCategories/ItemCategory.controller.ts
+++ b/packages/server-nest/src/modules/ItemCategories/ItemCategory.controller.ts
@@ -9,8 +9,10 @@ import {
 } from '@nestjs/common';
 import { ItemCategoryApplication } from './ItemCategory.application';
 import { IItemCategoryOTD } from './ItemCategory.interfaces';
+import { PublicRoute } from '../Auth/Jwt.guard';
 
 @Controller('item-categories')
+@PublicRoute()
 export class ItemCategoryController {
   constructor(
     private readonly itemCategoryApplication: ItemCategoryApplication,
diff --git a/packages/server-nest/src/modules/ItemCategories/ItemCategory.module.ts b/packages/server-nest/src/modules/ItemCategories/ItemCategory.module.ts
index 0626185a6..d9c22fc43 100644
--- a/packages/server-nest/src/modules/ItemCategories/ItemCategory.module.ts
+++ b/packages/server-nest/src/modules/ItemCategories/ItemCategory.module.ts
@@ -6,6 +6,9 @@ import { EditItemCategoryService } from './commands/EditItemCategory.service';
 import { GetItemCategoryService } from './queries/GetItemCategory.service';
 import { ItemCategoryApplication } from './ItemCategory.application';
 import { ItemCategoryController } from './ItemCategory.controller';
+import { CommandItemCategoryValidatorService } from './commands/CommandItemCategoryValidator.service';
+import { TransformerInjectable } from '../Transformer/TransformerInjectable.service';
+import { TenancyContext } from '../Tenancy/TenancyContext.service';
 
 @Module({
   imports: [TenancyDatabaseModule],
@@ -16,6 +19,9 @@ import { ItemCategoryController } from './ItemCategory.controller';
     GetItemCategoryService,
     DeleteItemCategoryService,
     ItemCategoryApplication,
+    CommandItemCategoryValidatorService,
+    TransformerInjectable,
+    TenancyContext
   ],
 })
 export class ItemCategoryModule {}
diff --git a/packages/server-nest/src/modules/ItemCategories/commands/CommandItemCategoryValidator.service.ts b/packages/server-nest/src/modules/ItemCategories/commands/CommandItemCategoryValidator.service.ts
index b11a46f35..5b827e122 100644
--- a/packages/server-nest/src/modules/ItemCategories/commands/CommandItemCategoryValidator.service.ts
+++ b/packages/server-nest/src/modules/ItemCategories/commands/CommandItemCategoryValidator.service.ts
@@ -1,10 +1,11 @@
 import { Account } from '@/modules/Accounts/models/Account.model';
 import { ItemCategory } from '../models/ItemCategory.model';
-import { Inject } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
 import { ServiceError } from '@/modules/Items/ServiceError';
 import { ERRORS } from '../constants';
 import { ACCOUNT_ROOT_TYPE, ACCOUNT_TYPE } from '@/constants/accounts';
 
+@Injectable()
 export class CommandItemCategoryValidatorService {
   constructor(
     @Inject(ItemCategory.name)
diff --git a/packages/server-nest/src/modules/ItemCategories/commands/CreateItemCategory.service.ts b/packages/server-nest/src/modules/ItemCategories/commands/CreateItemCategory.service.ts
index 1988aa026..16bfa5147 100644
--- a/packages/server-nest/src/modules/ItemCategories/commands/CreateItemCategory.service.ts
+++ b/packages/server-nest/src/modules/ItemCategories/commands/CreateItemCategory.service.ts
@@ -26,12 +26,15 @@ export class CreateItemCategoryService {
    * Transforms OTD to model object.
    * @param {IItemCategoryOTD} itemCategoryOTD
    * @param {ISystemUser} authorizedUser
+   * @returns {ItemCategory}
    */
   private transformOTDToObject(
     itemCategoryOTD: IItemCategoryOTD,
-    authorizedUser: SystemUser,
-  ): ItemCategory {
-    return { ...itemCategoryOTD, userId: authorizedUser.id };
+  ): Partial<ItemCategory> {
+    return {
+      ...itemCategoryOTD,
+      // userId: authorizedUser.id
+    };
   }
   /**
    * Inserts a new item category.
@@ -58,10 +61,8 @@ export class CreateItemCategoryService {
         itemCategoryOTD.inventoryAccountId,
       );
     }
-    const itemCategoryObj = this.transformOTDToObject(
-      itemCategoryOTD,
-      authorizedUser,
-    );
+    const itemCategoryObj = this.transformOTDToObject(itemCategoryOTD);
+
     // Creates item category under unit-of-work evnirement.
     return this.uow.withTransaction(async (trx: Knex.Transaction) => {
       // Inserts the item category.
diff --git a/packages/server-nest/src/modules/ItemCategories/commands/EditItemCategory.service.ts b/packages/server-nest/src/modules/ItemCategories/commands/EditItemCategory.service.ts
index 7152a64eb..6e78d5b70 100644
--- a/packages/server-nest/src/modules/ItemCategories/commands/EditItemCategory.service.ts
+++ b/packages/server-nest/src/modules/ItemCategories/commands/EditItemCategory.service.ts
@@ -10,12 +10,14 @@ import { SystemUser } from '@/modules/System/models/SystemUser';
 import { Knex } from 'knex';
 import { ItemCategory } from '../models/ItemCategory.model';
 import { Inject } from '@nestjs/common';
+import { TenancyContext } from '@/modules/Tenancy/TenancyContext.service';
 
 export class EditItemCategoryService {
   constructor(
     private readonly uow: UnitOfWork,
     private readonly validator: CommandItemCategoryValidatorService,
     private readonly eventEmitter: EventEmitter2,
+    private readonly tenancyContext: TenancyContext,
     @Inject(ItemCategory.name)
     private readonly itemCategoryModel: typeof ItemCategory,
   ) {}
@@ -29,7 +31,7 @@ export class EditItemCategoryService {
   public async editItemCategory(
     itemCategoryId: number,
     itemCategoryOTD: IItemCategoryOTD,
-  ): Promise<IItemCategory> {
+  ): Promise<ItemCategory> {
     // Retrieve the item category from the storage.
     const oldItemCategory = await this.itemCategoryModel
       .query()
@@ -52,11 +54,14 @@ export class EditItemCategoryService {
         itemCategoryOTD.inventoryAccountId,
       );
     }
+    // Retrieves the authorized user.
+    const authorizedUser = await this.tenancyContext.getSystemUser();
+
     const itemCategoryObj = this.transformOTDToObject(
       itemCategoryOTD,
       authorizedUser,
     );
-    //
+    // Creates item category under unit-of-work evnirement.
     return this.uow.withTransaction(async (trx: Knex.Transaction) => {
       //
       const itemCategory = await ItemCategory.query().patchAndFetchById(
diff --git a/packages/server-nest/src/modules/ItemCategories/models/ItemCategory.model.ts b/packages/server-nest/src/modules/ItemCategories/models/ItemCategory.model.ts
index 8f61a4c91..462aa8fdc 100644
--- a/packages/server-nest/src/modules/ItemCategories/models/ItemCategory.model.ts
+++ b/packages/server-nest/src/modules/ItemCategories/models/ItemCategory.model.ts
@@ -5,6 +5,15 @@ import { Model, mixin } from 'objection';
 // import ItemCategorySettings from './ItemCategory.Settings';
 
 export class ItemCategory extends BaseModel {
+  name!: string;
+  description!: string;
+
+  costAccountId!: number;
+  sellAccountId!: number;
+  inventoryAccountId!: number;
+
+  userId!: number;
+
   /**
    * Table name.
    */
@@ -58,6 +67,6 @@ export class ItemCategory extends BaseModel {
    * Model meta.
    */
   // static get meta() {
-    // return ItemCategorySettings;
+  // return ItemCategorySettings;
   // }
 }
diff --git a/packages/server-nest/src/modules/Tenancy/TenancyModels/Tenancy.module.ts b/packages/server-nest/src/modules/Tenancy/TenancyModels/Tenancy.module.ts
index d6522be4f..57ea4aefe 100644
--- a/packages/server-nest/src/modules/Tenancy/TenancyModels/Tenancy.module.ts
+++ b/packages/server-nest/src/modules/Tenancy/TenancyModels/Tenancy.module.ts
@@ -6,8 +6,19 @@ import { Item } from '../../../modules/Items/models/Item';
 import { Account } from '@/modules/Accounts/models/Account.model';
 import { ItemEntry } from '@/modules/Items/models/ItemEntry';
 import { AccountTransaction } from '@/modules/Accounts/models/AccountTransaction.model';
+import { Expense } from '@/modules/Expenses/models/Expense.model';
+import ExpenseCategory from '@/modules/Expenses/models/ExpenseCategory.model';
+import { ItemCategory } from '@/modules/ItemCategories/models/ItemCategory.model';
 
-const models = [Item, Account, ItemEntry, AccountTransaction];
+const models = [
+  Item,
+  Account,
+  ItemEntry,
+  AccountTransaction,
+  Expense,
+  ExpenseCategory,
+  ItemCategory,
+];
 
 const modelProviders = models.map((model) => {
   return {
diff --git a/packages/server-nest/src/utils/moment-mysql.ts b/packages/server-nest/src/utils/moment-mysql.ts
new file mode 100644
index 000000000..c911e15a9
--- /dev/null
+++ b/packages/server-nest/src/utils/moment-mysql.ts
@@ -0,0 +1,14 @@
+import * as moment from 'moment';
+
+// Extends moment prototype to add a new method to format date to MySQL datetime format.
+moment.prototype.toMySqlDateTime = function () {
+  return this.format('YYYY-MM-DD HH:mm:ss');
+};
+
+declare global {
+  namespace moment {
+    interface Moment {
+      toMySqlDateTime(): string;
+    }
+  }
+}
diff --git a/packages/server-nest/test/item-categories.e2e-spec.ts b/packages/server-nest/test/item-categories.e2e-spec.ts
new file mode 100644
index 000000000..3dc681655
--- /dev/null
+++ b/packages/server-nest/test/item-categories.e2e-spec.ts
@@ -0,0 +1,49 @@
+import * as request from 'supertest';
+import { faker } from '@faker-js/faker';
+import { app } from './init-app-test';
+
+describe('Item Categories(e2e)', () => {
+  it('/item-categories (POST)', () => {
+    return request(app.getHttpServer())
+      .post('/item-categories')
+      .set('organization-id', '4064541lv40nhca')
+      .send({
+        name: faker.person.fullName(),
+        description: faker.lorem.sentence(),
+      })
+      .expect(201);
+  });
+
+  it('/item-categories/:id (GET)', async () => {
+    const response = await request(app.getHttpServer())
+      .post('/item-categories')
+      .set('organization-id', '4064541lv40nhca')
+      .send({
+        name: faker.person.fullName(),
+        description: faker.lorem.sentence(),
+      });
+    const itemCategoryId = response.body.id;
+
+    return request(app.getHttpServer())
+      .get(`/item-categories/${itemCategoryId}`)
+      .set('organization-id', '4064541lv40nhca')
+      .expect(200);
+  });
+
+  it('/item-categories/:id (DELETE)', async () => {
+    const response = await request(app.getHttpServer())
+      .post('/item-categories')
+      .set('organization-id', '4064541lv40nhca')
+      .send({
+        name: faker.person.fullName(),
+        description: faker.lorem.sentence(),
+      });
+
+    const itemCategoryId = response.body.id;
+
+    return request(app.getHttpServer())
+      .delete(`/item-categories/${itemCategoryId}`)
+      .set('organization-id', '4064541lv40nhca')
+      .expect(200);
+  });
+});
diff --git a/packages/server-nest/test/items.e2e-spec.ts b/packages/server-nest/test/items.e2e-spec.ts
index 4d0060304..185037f85 100644
--- a/packages/server-nest/test/items.e2e-spec.ts
+++ b/packages/server-nest/test/items.e2e-spec.ts
@@ -1,8 +1,5 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { INestApplication } from '@nestjs/common';
 import * as request from 'supertest';
 import { faker } from '@faker-js/faker';
-import { AppModule } from '../src/modules/App/App.module';
 import { app } from './init-app-test';
 
 describe('Items (e2e)', () => {
diff --git a/packages/server/src/services/Expenses/CRUD/CreateExpense.ts b/packages/server/src/services/Expenses/CRUD/CreateExpense.ts
index a342daed7..f64eba1a2 100644
--- a/packages/server/src/services/Expenses/CRUD/CreateExpense.ts
+++ b/packages/server/src/services/Expenses/CRUD/CreateExpense.ts
@@ -20,7 +20,7 @@ export class CreateExpense {
   private tenancy: HasTenancyService;
 
   @Inject()
-  private eventPublisher: EventPublisher;
+private eventPublisher: EventPublisher;
 
   @Inject()
   private uow: UnitOfWork;