I need a solution for the creation of an ABA file enabling - upload payments for multiple customers to the bank and the creation of the cheque in their account.

Hi, shilo2. I can help you set up ABA files for multiple users and guide you on how to create a cheque for their accounts.

To enable an ABA file, here's a step for you:

1. Navigate to the Gear icon and choose Chart of Accounts.
2. Locate your bank account.
3. In the Action column, click on the dropdown ▼ and select Edit.
4. Tick the checkbox that says I create batch payments for this account.
5. Enter the required bank details, then click Save and Close.

To the supplier you want to pay via ABA file, please follow the steps below:

1. Navigate to Expenses and choose Suppliers (Take me there).
2. Choose the supplier for whom you want to set up batch payments.
3. Click on Edit.
4. Mark the checkbox labeled I create batch payments to pay this supplier.
5. Enter the banking details of the supplier and then click Save.

For further information on how to enable batch payments and create ABA files, please refer to this article: How to enable batch payments or create ABA Files.

You can also consult this article to find out how to configure ABA files in QuickBooks: Set up and create ABA files in QuickBooks Payroll.

Any additional help regarding to your batch payments, just feel free to reply to the thread below and we'll be here to assist you promptly. Best wishes!