Deductions & Credits / Estimates and Other Taxes Paid.
If you are using Online then from the left menu you might not see it, go to the Deductions & Credits Summary and you should be able to scroll down thru the sections or may need to slick "Add More Tax Breaks" or some button like that.
see also
https://ttlc.intuit.com/community/taxes/discussion/where-do-i-add-estimated-state-income-taxes-paid-...
