Hello there, @Rick Harris!
When paying your liabilities using the Write Checks functions, you'll still need to create a liability check directly from your Payroll Center so it'll reduce the total amount of your liability.
Now on your Payroll Center, you'll have to remove the checkmark on the To be printed option so you can enter ACH as the transaction number when creating a liability check.
In addition, here's an article you can read to learn more about how you pay your liabilities in the system: Set up and pay scheduled or custom (unscheduled) liabilities.
Lastly, I've got you this helpful article for ideas about how to correctly enter the payment of your liabilities: Correct liability payments made in Write Checks instead of Pay Liabilities.
Keep me posted in the comments if you have any other questions. I'll be here to lend a helping hand.