I'm trying to record transactions from the bank but it refuses without assigning tax rate though it's non tax transaction "it's a vendor payment"

I'd be more than happy to keep you moving forward with your task, @afyaoilmills.

First off, may I know which of the QBO version you're currently using as well as the region you are residing in? Additionally, may I know the exact error that you've encountered during the process? This way, I will be able to replicate your concern and provide you with the most efficient resolution.

For now, let's make sure to choose a nontaxable category and select Out of scope tax under the amounts drop-down for you to be able to save the transaction. Feel free to use this screenshot below as your reference:

In addition, if you need more help in categorizing bank transactions, you can refer to this article: Categorize and match online bank transactions in QuickBooks Online.

Leave a line if you have follow-up questions about QBO. I'm happy to answer any questions you may have. Have a good one.