You can go through the estimated tax questionnaire in TurboTax. To generate estimated tax payment amounts for 2018, sign in and click on 'Take me to my return'. Then click on:
- Federal (left) >>
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Other Tax Situations (top) >>
- Other Tax Forms >>
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Form W-4 and estimated taxes - Start >>
- You can skip (answer No) to the W-4 question >>
- Answer the remaining questions using your best estimates for 2018
- When arriving at the Print Vouchers? screen, answer Yes. They'll print with your federal return.
- If you get the No Payments screen instead, you don't need to make 2018 estimated payments based on what you entered.