Thank you for sharing a screenshot of the error message upon trying to switch the bank account to pay your tax payments, @tlcele.
I've checked if there's a reported issue regarding this matter, and I haven't found one. Let's perform some troubleshooting steps to get this issue fixed so you can get back to working order.
One of the possible reasons why QuickBooks received unusual errors is because of the browser data issue. To verify, let's log in to your QuickBooks Online (QBO) account using a private browser. To do so, press this shortcut key on your keyboard:
- Google Chrome: Ctrl + Shift + N
- Mozilla Firefox: Ctrl + Shift + P
- Safari: Command + Option + P
Once done, go back and pay your 940/941 taxes again to double-check. If this works, it means that you need to clear the browser's cache so the system can start fresh. If you get the same result while using a private browser, I recommend switching to a different one.
You may want to know more about how QuickBooks populates form 941. This article will break down all the lines on each page: How QuickBooks populates Form 941.
Come back to this post and let me know how it goes, @tlcele. I want to make sure this issue is taken care of.