You can enter the extra CA state withholdings on the rental sale under the section for estimated state tax payments.
If you do not have a specific date when these CA taxes were withheld, just choose the 4th quarter, CA from the dropdown menu and change the date to 12/31/2016 then enter the amount.
These estimated state tax payment amounts will flow through to your CA state income tax return.
Once you have signed into your TurboTax Account (for TurboTax Online sign-in, click Here), select "Take Me To My Return" and type "estimated tax payments" in the search bar then select "jump to estimated tax payments". This will take you to the Other Income Taxes section
Alternatively, to enter your state income taxes in TurboTax Online or Desktop, please follow these steps:
The state taxes you paid to CA might not affect your federal return.
State taxes are only deductible if you itemize, and the total deduction for taxes is limited to $10,000.
So if you already have $10,000 in taxes, you won't receive a tax benefit from the additional deduction.