How to fix a miscalculation on schedule A?

[rphdenis]

I get a deduction of $39,355 and Turbotax gets $40,000 (the maximum).

[MonikaK1]

Please clarify. Have you entered state and local taxes into TurboTax? If so, review your entries to see if your manual calculation included all of the different types of state and local taxes that TurboTax may have determined to be deductible up to $40,000.

See this TurboTax tips article for more information about the SALT deduction for 2025.

TurboTax calculations are 100% accurate and our software is tested and retested to ensure that you get your maximum refund, guaranteed. See this tax tips article for more information.

[VolvoGirl · Accepted solution]

Turbo Tax is giving you the 40,000max but you only add up 39,355?   So you are $645 short?   What are you adding?  You could be missing some taxes from W2 box 14 or 19 or car registration fees.   

IRS Schedule A

https://www.irs.gov/pub/irs-pdf/f1040sa.pdf

See 1040 Schedule A instructions for line 5

https://www.irs.gov/pub/irs-pdf/i1040sca.pdf

SALT State and local taxes

See line 5a page 3  Includes……

-any state withholding from your paychecks, retirement checks, unemployment checks, etc.

-a state tax due (for any year) you paid last year

-any state estimated tax payments you made during year including an overpayment applied from last year

-any local taxes withheld on your checks like SDI in box 14 or 19 on your W2

Also

State and local real estate property taxes.  See line 5b page 6

State and local personal property taxes.  See line 5c page 6

[rphdenis]

Thank you! The calculation was fine. I had forgotten the state income tax due, paid last year. I appreciate your help.