To add estimated federal and state quarterly taxes paid (before filing):

1. Sign In or Open TurboTax

2.  Select "Take me to my return" (Online)

3.  Select "My Account" on top right of the screen (Online)

4.  Click on "Tools"

5.  Go to "Topics Search" (Online) or "Search Topics" in the top center of screen (Desktop)

6. Type "estimated tax payments" and press "enter" (Online) or "ok" (Desktop) to add estimated federal and state quarterly taxes paid.