diff --git a/.env.sample b/.env.sample
index 370bca4..69d0c09 100644
--- a/.env.sample
+++ b/.env.sample
@@ -1,4 +1,5 @@
-TOPCODER_API_BASE_URL="https://api.topcoder-dev.com/v5"
+TOPCODER_API_V5_BASE_URL="https://api.topcoder-dev.com/v5"
+TOPCODER_API_V6_BASE_URL="https://api.topcoder-dev.com/v6"
 AUTH0_CERT="-----BEGIN RSA PUBLIC KEY-----
 MIIBCgKCAQEArAV0dmDkedFdlaQ6KQiqUv+UGshfMXx/4jJCLZ9802ynJqAvIt+Z
 V7EiPqjc2J1xVfJJEvQ9ZS5A2TFWAk16NUTU4LN+TkjEnqeg+LlUPWY3Y4RXa2OU
@@ -15,4 +16,4 @@ DB_PASSWORD=randompassword
 DB_HOST=127.0.0.1
 DB_PORT=5434
 DB_NAME=walletdb
-DATABASE_URL="postgresql://${DB_USERNAME}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_NAME}?sslmode=disable"
\ No newline at end of file
+DATABASE_URL="postgresql://${DB_USERNAME}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_NAME}?sslmode=disable"
diff --git a/src/api/admin/admin.service.ts b/src/api/admin/admin.service.ts
index 56b36af..76fd54c 100644
--- a/src/api/admin/admin.service.ts
+++ b/src/api/admin/admin.service.ts
@@ -13,10 +13,7 @@ import { ResponseDto } from 'src/dto/api-response.dto';
 import { PaymentStatus } from 'src/dto/payment.dto';
 import { WinningAuditDto, AuditPayoutDto } from './dto/audit.dto';
 import { WinningUpdateRequestDto } from './dto/winnings.dto';
-import {
-  AdminPaymentUpdateData,
-  TopcoderChallengesService,
-} from 'src/shared/topcoder/challenges.service';
+import { TopcoderChallengesService } from 'src/shared/topcoder/challenges.service';
 import { Logger } from 'src/shared/global';
 
 /**
@@ -307,30 +304,6 @@ export class AdminService {
         }
       });
 
-      transactions.push(async () => {
-        const winning = await this.getWinningById(winningsId);
-        if (!winning) {
-          this.logger.error(
-            `Error updating legacy system for winning ${winningsId}. Winning not found!`,
-          );
-          throw new Error(
-            `Error updating legacy system for winning ${winningsId}. Winning not found!`,
-          );
-        }
-
-        const payoutData: AdminPaymentUpdateData = {
-          userId: +winning.winner_id,
-          status: body.paymentStatus,
-          amount: body.paymentAmount,
-          releaseDate: body.releaseDate,
-        };
-
-        await this.tcChallengesService.updateLegacyPayments(
-          winning.external_id as string,
-          payoutData,
-        );
-      });
-
       // Run all transaction tasks in a single prisma transaction
       await this.prisma.$transaction(async (tx) => {
         for (const transaction of transactions) {
diff --git a/src/api/challenges/challenges.service.ts b/src/api/challenges/challenges.service.ts
index 71e8d88..b4aaf2a 100644
--- a/src/api/challenges/challenges.service.ts
+++ b/src/api/challenges/challenges.service.ts
@@ -12,7 +12,11 @@ import { BillingAccountsService } from 'src/shared/topcoder/billing-accounts.ser
 import { TopcoderM2MService } from 'src/shared/topcoder/topcoder-m2m.service';
 import { ChallengeStatuses } from 'src/dto/challenge.dto';
 import { WinningsService } from '../winnings/winnings.service';
-import { WinningsCategory, WinningsType } from 'src/dto/winning.dto';
+import {
+  WinningRequestDto,
+  WinningsCategory,
+  WinningsType,
+} from 'src/dto/winning.dto';
 import { WinningsRepository } from '../repository/winnings.repo';
 
 const placeToOrdinal = (place: number) => {
@@ -23,7 +27,7 @@ const placeToOrdinal = (place: number) => {
   return `${place}th`;
 };
 
-const { TOPCODER_API_V6_BASE_URL, TGBillingAccounts } = ENV_CONFIG;
+const { TOPCODER_API_V6_BASE_URL: TC_API_BASE, TGBillingAccounts } = ENV_CONFIG;
 
 @Injectable()
 export class ChallengesService {
@@ -37,7 +41,7 @@ export class ChallengesService {
   ) {}
 
   async getChallenge(challengeId: string) {
-    const requestUrl = `${TOPCODER_API_V6_BASE_URL}/challenges/${challengeId}`;
+    const requestUrl = `${TC_API_BASE}/challenges/${challengeId}`;
 
     try {
       const challenge = await this.m2MService.m2mFetch<Challenge>(requestUrl);
@@ -51,7 +55,7 @@ export class ChallengesService {
   }
 
   async getChallengeSubmissionsCount(challengeId: string) {
-    const requestUrl = `${TOPCODER_API_V6_BASE_URL}/submissions?challengeId=${challengeId}&perPage=9999`;
+    const requestUrl = `${TC_API_BASE}/submissions?challengeId=${challengeId}&perPage=9999`;
 
     try {
       const submissions =
@@ -71,10 +75,10 @@ export class ChallengesService {
   async getChallengeResources(challengeId: string) {
     try {
       const resources = await this.m2MService.m2mFetch<ChallengeResource[]>(
-        `${TOPCODER_API_V6_BASE_URL}/resources?challengeId=${challengeId}`,
+        `${TC_API_BASE}/resources?challengeId=${challengeId}`,
       );
       const resourceRoles = await this.m2MService.m2mFetch<ResourceRole[]>(
-        `${TOPCODER_API_V6_BASE_URL}/resource-roles`,
+        `${TC_API_BASE}/resource-roles`,
       );
 
       const rolesMap = resourceRoles.reduce(
@@ -217,7 +221,7 @@ export class ChallengesService {
         billingAccountId: challenge.billing.billingAccountId,
         payroll: includes(
           TGBillingAccounts,
-          +challenge.billing.billingAccountId,
+          parseInt(challenge.billing.billingAccountId),
         ),
       },
     }));
@@ -240,7 +244,9 @@ export class ChallengesService {
     }
 
     const existingPayments = (
-      await this.winningsRepo.searchWinnings({ externalIds: [challengeId] })
+      await this.winningsRepo.searchWinnings({
+        externalIds: [challengeId],
+      } as WinningRequestDto)
     )?.data?.winnings;
     if (existingPayments?.length > 0) {
       this.logger.log(
diff --git a/src/api/repository/winnings.repo.ts b/src/api/repository/winnings.repo.ts
index 798e50b..c6d932b 100644
--- a/src/api/repository/winnings.repo.ts
+++ b/src/api/repository/winnings.repo.ts
@@ -56,8 +56,8 @@ export class WinningsRepository {
   private getWinningsQueryFilters(
     type?: string,
     status?: string,
-    winnerIds?: string[] | undefined,
-    externalIds?: string[] | undefined,
+    winnerIds?: string[],
+    externalIds?: string[],
     date?: DateFilterType,
   ): Prisma.winningsFindManyArgs['where'] {
     return {
@@ -176,7 +176,7 @@ export class WinningsRepository {
 
       const orderBy = this.getOrderByWithWinnerId(
         searchProps.sortBy,
-        searchProps.sortOrder!,
+        searchProps.sortOrder,
         !winnerIds && !!externalIds?.length,
       );
 
@@ -240,9 +240,9 @@ export class WinningsRepository {
         })),
         pagination: {
           totalItems: count,
-          totalPages: Math.ceil(count / searchProps.limit!),
-          pageSize: searchProps.limit!,
-          currentPage: Math.ceil(searchProps.offset! / searchProps.limit!) + 1,
+          totalPages: Math.ceil(count / searchProps.limit),
+          pageSize: searchProps.limit,
+          currentPage: Math.ceil(searchProps.offset / searchProps.limit) + 1,
         },
       };
       // response.data = winnings as any
diff --git a/src/api/withdrawal/withdrawal.service.ts b/src/api/withdrawal/withdrawal.service.ts
index 10a9179..38b61f1 100644
--- a/src/api/withdrawal/withdrawal.service.ts
+++ b/src/api/withdrawal/withdrawal.service.ts
@@ -12,10 +12,7 @@ import {
 } from '@prisma/client';
 import { TrolleyService } from 'src/shared/global/trolley.service';
 import { PaymentsService } from 'src/shared/payments';
-import {
-  TopcoderChallengesService,
-  WithdrawUpdateData,
-} from 'src/shared/topcoder/challenges.service';
+import { TopcoderChallengesService } from 'src/shared/topcoder/challenges.service';
 import { TopcoderMembersService } from 'src/shared/topcoder/members.service';
 import { BasicMemberInfo, BASIC_MEMBER_FIELDS } from 'src/shared/topcoder';
 import { Logger } from 'src/shared/global';
@@ -35,16 +32,6 @@ interface ReleasableWinningRow {
   datePaid: Date;
 }
 
-function formatDate(date = new Date()) {
-  const pad = (n, z = 2) => String(n).padStart(z, '0');
-
-  return (
-    `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())} ` +
-    `${pad(date.getHours())}:${pad(date.getMinutes())}:${pad(date.getSeconds())}.` +
-    `${pad(date.getMilliseconds(), 3)}`
-  );
-}
-
 @Injectable()
 export class WithdrawalService {
   private readonly logger = new Logger(WithdrawalService.name);
@@ -367,26 +354,6 @@ export class WithdrawalService {
           this.logger.error(errorMsg, error);
           throw new Error(errorMsg);
         }
-
-        try {
-          for (const winning of winnings) {
-            const payoutData: WithdrawUpdateData = {
-              userId: +userId,
-              status: 'Paid',
-              datePaid: formatDate(new Date()),
-            };
-
-            await this.tcChallengesService.updateLegacyPayments(
-              winning.externalId as string,
-              payoutData,
-            );
-          }
-        } catch (error) {
-          this.logger.error(
-            `Failed to update legacy payment while withdrawing for challenge ${error?.message ?? error}`,
-            error,
-          );
-        }
       });
     } catch (error) {
       if (error.code === 'P2010' && error.meta?.code === '55P03') {
diff --git a/src/config/config.env.ts b/src/config/config.env.ts
index 62e7ad4..529eaf4 100644
--- a/src/config/config.env.ts
+++ b/src/config/config.env.ts
@@ -20,7 +20,7 @@ export class ConfigEnv {
   PORT = 3000;
 
   @IsString()
-  TOPCODER_API_BASE_URL!: string;
+  TOPCODER_API_V5_BASE_URL!: string;
 
   @IsString()
   TOPCODER_API_V6_BASE_URL!: string;
@@ -114,6 +114,6 @@ export class ConfigEnv {
   @IsString()
   SENDGRID_TEMPLATE_ID_OTP_CODE: string = 'd-2d0ab9f6c9cc4efba50080668a9c35c1';
 
-  @IsInt({each: true})
+  @IsInt({ each: true })
   TGBillingAccounts = [80000062, 80002800];
 }
diff --git a/src/shared/topcoder/bus.service.ts b/src/shared/topcoder/bus.service.ts
index 8397eec..e24c105 100644
--- a/src/shared/topcoder/bus.service.ts
+++ b/src/shared/topcoder/bus.service.ts
@@ -3,7 +3,7 @@ import { ENV_CONFIG } from 'src/config';
 import { TopcoderM2MService } from './topcoder-m2m.service';
 import { Logger } from '../global';
 
-const { TOPCODER_API_BASE_URL } = ENV_CONFIG;
+const { TOPCODER_API_V5_BASE_URL: TC_API_BASE } = ENV_CONFIG;
 
 @Injectable()
 export class TopcoderBusService {
@@ -43,7 +43,7 @@ export class TopcoderBusService {
 
     try {
       const headers = await this.getHeaders();
-      const response = await fetch(`${TOPCODER_API_BASE_URL}/bus/events`, {
+      const response = await fetch(`${TC_API_BASE}/bus/events`, {
         method: 'POST',
         headers,
         body: JSON.stringify({
diff --git a/src/shared/topcoder/challenges.service.ts b/src/shared/topcoder/challenges.service.ts
index 308ed48..063a2de 100644
--- a/src/shared/topcoder/challenges.service.ts
+++ b/src/shared/topcoder/challenges.service.ts
@@ -1,11 +1,7 @@
 import { Injectable } from '@nestjs/common';
 import { TopcoderM2MService } from './topcoder-m2m.service';
-import { ENV_CONFIG } from 'src/config';
-import { payment_status } from '@prisma/client';
 import { Logger } from 'src/shared/global';
 
-const { TOPCODER_API_BASE_URL } = ENV_CONFIG;
-
 export interface WithdrawUpdateData {
   userId: number;
   status: string;
@@ -18,57 +14,9 @@ export interface AdminPaymentUpdateData {
   amount: number;
   releaseDate: string;
 }
-
-const mapStatus = (payoutData: WithdrawUpdateData | AdminPaymentUpdateData) => {
-  return {
-    ...payoutData,
-    status: {
-      [payment_status.CANCELLED]: 'Cancelled',
-      [payment_status.FAILED]: 'Failed',
-      [payment_status.ON_HOLD]: 'OnHold',
-      [payment_status.ON_HOLD_ADMIN]: 'OnHoldAdmin',
-      [payment_status.OWED]: 'Owed',
-      [payment_status.PAID]: 'Paid',
-      [payment_status.PROCESSING]: 'Processing',
-      [payment_status.RETURNED]: 'Returned',
-    }[payoutData.status],
-  };
-};
-
 @Injectable()
 export class TopcoderChallengesService {
   private readonly logger = new Logger(TopcoderChallengesService.name);
 
   constructor(private readonly m2MService: TopcoderM2MService) {}
-
-  async updateLegacyPayments(
-    challengeId: string,
-    payoutData: WithdrawUpdateData | AdminPaymentUpdateData,
-  ) {
-    const requestData = mapStatus(payoutData);
-    const requestUrl = `${TOPCODER_API_BASE_URL}/challenges/${challengeId}/legacy-payment`;
-
-    this.logger.debug(
-      `Updating legacy payment for challenge ${challengeId} with data: ${JSON.stringify(requestData, null, 2)}`,
-    );
-
-    try {
-      const response = await this.m2MService.m2mFetch(requestUrl, {
-        method: 'PATCH',
-        body: JSON.stringify(requestData),
-      });
-
-      this.logger.debug(
-        `Response from updating legacy payment for challenge ${challengeId}: ${JSON.stringify(response, null, 2)}`,
-      );
-
-      return response;
-    } catch (e) {
-      this.logger.error(
-        `Failed to update legacy payment for challenge ${challengeId}! Error: ${e?.message ?? e}`,
-        e,
-      );
-      throw e;
-    }
-  }
 }
diff --git a/src/shared/topcoder/members.service.ts b/src/shared/topcoder/members.service.ts
index c0bc57f..a7ad113 100644
--- a/src/shared/topcoder/members.service.ts
+++ b/src/shared/topcoder/members.service.ts
@@ -5,7 +5,7 @@ import { TopcoderM2MService } from './topcoder-m2m.service';
 import { ENV_CONFIG } from 'src/config';
 import { Logger } from 'src/shared/global';
 
-const { TOPCODER_API_BASE_URL } = ENV_CONFIG;
+const { TOPCODER_API_V6_BASE_URL: TC_API_BASE } = ENV_CONFIG;
 
 @Injectable()
 export class TopcoderMembersService {
@@ -27,7 +27,7 @@ export class TopcoderMembersService {
 
     // Split the unique user IDs into chunks of 100 to comply with API request limits
     const requests = chunk(uniqUserIds, 30).map((chunk) => {
-      const requestUrl = `${TOPCODER_API_BASE_URL}/members?${chunk.map((id) => `userIds[]=${id}`).join('&')}&fields=handle,userId`;
+      const requestUrl = `${TC_API_BASE}/members?${chunk.map((id) => `userIds[]=${id}`).join('&')}&fields=handle,userId`;
       return fetch(requestUrl).then(
         async (response) =>
           (await response.json()) as { handle: string; userId: string },
@@ -77,7 +77,7 @@ export class TopcoderMembersService {
         e.message ?? e,
       );
     }
-    const requestUrl = `${TOPCODER_API_BASE_URL}/members/${handle}${fields ? `?fields=${fields.join(',')}` : ''}`;
+    const requestUrl = `${TC_API_BASE}/members/${handle}${fields ? `?fields=${fields.join(',')}` : ''}`;
 
     try {
       const response = await fetch(requestUrl, {