Thank you for posting here in the Community, @gaselec.

I understand how the ability to change the default message for remittance advice is beneficial to your business. Right now, I recommend manually changing the information upon sending the transaction within QuickBooks Online.

To ensure your voice is heard, I can pass along another feature request on my end. For the time being, you can visit our blog and sign up for our Newsletter.

Please know your voice is important to us, and we take customer’s suggestions as an opportunity to guide us on which area of the product we need to make improvements.

If you need tips in the future, visit our QuickBooks Help Articles site. 

Let me know if you have further questions or other concerns. Please know the Community has your back. I’ll be right here to assist further.