The Qrtly Est Tax Due on the main page shows $2,136 is due on Jan 18th, 2022. When I click on that link to pay those taxes, next to Pay Now it shows $1,839 is due.

Thanks for checking in with us, mikelb21.

The amount shown on your main page is the total tax amount. However, the $1,839 is the total amount due from the last quarter and needed to pay this month.
 

For other payment options, see this article for your reference: Pay federal estimated quarterly taxes in QuickBooks Self-Employed. On the same link, you'll find steps on how to make an EFTPS account as well as checking your payment status.

In case you need help with filing your annual taxes, you can scan through these articles for more details:

Get quarterly and annual tax info from QuickBooks Self-Employed.

QuickBooks Self-Employed annual tax guide.

Keep me posted if you have any other questions about QuickBooks Self-Employed. I'm always up to keep helping. Have a nice day!