Property tax deduction appears incorrect

There are other taxes that count.  Like state withholding on your W2s and any 1099s.  And a state tax due you paid last year.  Any state estimates you paid it 2021.  All the taxes you paid are limited to 10,000 now.  Look at Schedule A to see what's being included.

review schedule A. real estate taxes are on one line, state income taxes on another, etc. you may be looking at a combined total for all taxes. if schedule A shows $10,000 for real estate taxes, then go back to the 1098 to check the real estate tax amount and make sure you didn't enter real estate taxes somewhere else.

Thanks, everyone. I didn't notice that state and local taxes were included in the deductions breakdown (on the same line as property taxes no less), partly because I didn't realize they were deductible. Until now I've never been in a position where itemized deductions made more sense than standard, so I'd never seen the breakdown.

Schedule A looks correct. So we're good.

Surprising you have enough total deductions to itemize.  Usually it's the other way around now.  People can't itemize anymore because the Standard Deduction has increased a lot.  Did you have a lot of medical or something?  Did your income go down?  

I've been fortunate. I bought a house last year (so mortgage interest is a factor now), and state income tax is higher than average where I live. State income tax plus property tax was greater than $10,000, and mortgage interest pushed it over the standard.