Welcome to the Community space, scamygordon.
Recording prior tax payments in QuickBooks Online (QBO) is a non-posting transaction. Thus, it will not affect the bank register, but it will clear the taxes from showing due and record the deposits. This is the reason why it doesn't post on your register.
To learn more about recording your tax payments, see this article: Recording prior tax payments.
For future reference, you may want to visit the below links which you may find helpful. These can walk you through the steps in running your payroll and filing your taxes efficiently:
Keep in touch if you have any clarifications or other concerns. I’m always ready to lend a helping hand. Have a great week ahead.
I've found this answer on your questions page. However, I really need to know how to manually post it to my register since it is taken from the bank account - which will need to be reconciled.
Let me guide you on how you can post the tax payment to the register, scamygordon.
Generally, creating sales forms like invoices or sales receipts is one of the best ways to record transactions for your business. You'll want to add transactions manually by following the steps below:
You may also want to reach out to your accountant for the correct category to use. I've added this article in case you want more details: Manually Add Transactions To Account Registers In QuickBooks Online. Furthermore, learn how to categorize transactions in QuickBooks Online. Please check out this article for your reference: Categorize and Match Online Bank Transactions In QuickBooks Online.
Feel free to let us know if you have any other questions about local taxes. We're here to help you anytime.