We appreciate you for joining the thread, dojoboy.

The option to edit or customize the payment instructions of QuickBooks Payments is unavailable. We see consumer feedback as an opportunity to improve our products' numerous features. I'd suggest providing direct feedback to our engineers. They may investigate this suggestion and include it in future updates. Let me show you:

1. Go to the Gear icon.
2. Hit Feedback.
3. Type in your recommendation in the Share your feedback field.
4. Press Next.
5. Follow the on-screen instructions to complete the process.

I've attached screenshots below for your reference:

Feel free to visit his page to stay up to date on the latest software improvements and enhancements with QBO: Customer Feedback for QuickBooks Online.

Alternatively, just customize the invoices before sending this one to your customers. Let them access their email and select the Review and pay or Pay invoice button to open and pay for the invoice. They can pay their invoices online by credit card or with an ACH bank transfer depending on the invoice's settings.

You can also create your own instruction and add it in the Memo field. Here's how:

1. Go to the Sales menu and choose the All Sales tab.
2. Select to open the payment.
3. Enter your payment instruction in the Memo field.
4. Once done, press Save and Close.
   
   

Just in case they can't process invoice payments, see What to do if customers can't pay their invoices online article to troubleshoot the problem. Visit our QuickBooks Payments page for more insights about managing your customer payments.

The Community will always have your back if you need anything else in processing payments or any QuickBooks related. Assistance is just one post away. You have a good one.