Estimated payments cover Fed/SS/medicare ... you don't pay any of them separately. If your state requires estimates remember to submit them also.
If you have already filed ... you can "break into" the closed return to use the estimation section ... be careful to NOT make any changes to the return. When you log in scroll down and click on ADD A STATE.
See this TurboTax support FAQ for calculating 2023 estimated tax payments - https://ttlc.intuit.com/turbotax-support/en-us/help-article/estimated-taxes/turbotax-calculate-next-...
