You have me to help you fix this error, klb_101-hotmail-.

This error means you can't assign a tax code when using a Liabilities Payable account. The default tax accounts are used to track taxes and shouldn't be used in creating transactions.

If you wish to use the Liability account, you can record a journal entry. After, you'll need to match the journal entry to the bank transaction.

You can go back to the banking page and match the journal entry to the bank transaction.

I'm just a post-away if you need help. Keep safe!