Good day, musicman1.
It's possible that the estimated taxes account category is not selected on the transaction. This is why no payments are showing up on the Taxes page.
Let's find the transaction and change the account category by following these steps:
- Go to the Transactions page.
- Filter the date to show Last year.
- Click the account link under the Category column.
- Search and select the Estimated taxes option.
Here's a sample screenshot for a visual guide:

Once done, go back to the Taxes page and check to see if the payment is displayed.
I'm also adding this article for reference: Manually add transactions in QuickBooks Self-Employed
Please let me know if you need anything else. Thanks.