How do I indicate the estimated tax payments in TurboTax?

You can enter the estimated taxes you paid for 2020 in the "Deductions & Credits" tab.

1. Scroll down to "Estimates and other taxes paid"
2. "Show More"
3. "Start/revisit" the "Estimated taxes paid" topic
4. "Start/revisit" the "Federal estimated taxes paid for 2020"