Creating ABA files is a feature exclusive to supplier-related transactions in QuickBooks Online (QBO) shilo2. I'll help you submit suggestions to our development team so the option to manage these files directly from customers gets reviewed and explored.
 

In the meantime, you can continue to use the workaround you've provided to achieve this goal.

We encourage you to send feedback about this feature through our feedback platform, which will help our development team to better understand your needs and consider incorporating this functionality in future updates.

Here's how to send feedback:

1. Login to your QuickBooks account.
2. Go to the Gear icon and select Feedback.
3. Enter your product suggestions in the designated field.
4. Click Next to submit.

You can stay informed about the status of any feedback you submit by visiting the following link: Customer Feedback for QuickBooks Online.

Additionally, I'd like to provide you with this resource that could be useful for your upcoming endeavors:

• Setup and create ABA files in QuickBooks Payroll.

We are here to assist you in managing your ABA file needs until the feature becomes available for customer transactions. If you have any more questions or require further assistance, please don't hesitate to reply. You'll hear from us shortly.