You can type estimates paid in the search box at the top of your return and click Find and it will give you a link to Jump To it.
OR
To enter Federal or State Estimated Taxes Paid, including a state estimated payment made in Jan 2020 for 2019 (or Jan 2021 for 2020), go to
Federal or Personal (for Home & Business version)
Deductions and Credits
Then scroll way down to Estimates and Other Taxes Paid
Estimated Taxes - click the Start or Update button
For 2020 Estimates Paid go directly to 1040 line 26 with refund applied from 2019.
