You would enter state estimates in the same area as Federal. See the screen shots below.
If you have state
tax estimates or any other payments enter them here:
• Click
on Federal Taxes (Personal using Home and Business)
• Click
on Deductions and Credits
• Click
on I'll choose what I work on (if shown)
• Scroll
down to Estimates and Other Taxes Paid
• On
Estimates, click on the start or update
button