To Enter Quarterly Estimated Taxes Payments:
- In TurboTax Self-Employed (online) or TurboTax Home & Business (desktop) click on the Personal tab;
- Click on the Deductions and Credits tab;
- Click on the button that says I'll Choose What I Work On;
- Scroll down to Estimates and Other Taxes Paid;
- Click on the Start button next to Estimates.
From there, you can select the type of estimated taxes paid and enter the amounts. Take particular care that you are entering payments for the tax correct year.