Hello, there are two ways you can do it:
1. Enter on line 6 on the "Tax Payments" worksheet - assuming you have applied 2019 tax refund to 2020 on your 2019 return.
2. Go to on Line 26 on page 2 of Form 1040 - 2020 Est. tax payments and amount applied from 2019 return, right click on your mouse and select "Quick Zoom", it will take you to the same Tax Payment worksheet on #1 above.
Hope it helps! 😛
