If you're using desktop TurboTax, here's navigation for the desktop version:
Federal Taxes tab (Personal tab if using Home and Business)
Subtab Deductions & Credits.
"I'll choose what I work on." (if asked)
Your Deductions & Credits Summary page.
Scroll way down the summary page to topic "Estimates and Other Income Taxes Paid".
Expand that section to show the subtopics, and a subtopic may either just say "Estimates" or the more wordy "Estimated Tax Payments." In any case, choose that subtopic.
On the next screen choose the appropriate category for these payments (Federal, state, local).
