Estimated taxes are entered under Deductions & Credits > Estimates and Other Taxes Paid. (Click the first screenshot below to enlarge it for reference.)
To enter your 2016 estimated tax payments in TurboTax Online:
- Open (continue) your return in TurboTax Online. (If your return isn't open, you'll need to sign in and click Take me to my return.)
- Click My Account (top right of your screen).
- Select Tools.
- In the pop-up window, select Topic Search.
- In the search bar, type estimated.
- In the results box, highlight estimated tax paid, then click GO.
- You'll land on the Estimates and Other Income Taxes page. Click Start next to the applicable estimated tax payments you wish to enter (federal, state, or local).
- Follow the onscreen instructions to enter your estimated payments. (Click the second screenshot below for an example.)