I got some other steps that you can consider, @MJBsBooks.

You can enter historical tax payments to correct your 2019 data. Let me walk you through the steps.

Here’s how in your QuickBooks Desktop (QBDT) software:

1. Go to the Help menu, choose About QuickBooks.
2. Press Ctrl + Alt + Y or Ctrl + Shift + Y in your keyboard to open the Setup YTD Amounts window.
3. Select Next until you reach the Enter prior payments section.
4. In the Enter Prior Payments window, select Create Payment to enter all prior payroll tax and non-tax payroll liability payments you have made during the current or previous years.
5. Enter the Payment Date and For Period Ending date accordingly.
6. In the Taxes and Liabilities field, choose the payroll tax item that you've already paid and want to record in QuickBooks Desktop. 
7. Select test the Accounts Affected... button
8. Click Next Payment after you have completed the first payment.
9. Select Done to save your work and click Finish.

You can also refer to this link for more details in entering historical tax payments in Desktop payroll.

You might also want to check this article for reference in case you need to learn how to enter historical payroll data.

Let me know if you have other queries in managing your taxes in QBDT. I’ll be around to answer them for you.