This site http://www.calcapmgt.com/resource-center/tax/six-most-overlooked-tax-deductions says you can deduct previous year's taxes for California. How do you do that?

[RobertG]

Here's how to do that in TurboTax

1. Type estimated taxes into the search box.
2. Click on Go to estimated taxes
3. Scroll down to Other Income Taxes Paid in 2019
4. Select  Balance due on your 2018 state taxes paid in 2019

[notmymonkey20]

Worked perfectly. Thanks so much for your help!