Why isn't Turbo Tax giving me my Illinois state property tax deduction

Did you complete that section in the IL return section of the program?

Try going back through it carefully.

also your federal adjusted gross income line 1 of Illinois can't exceed $500,000. IL PUB 108

IL has not yet published their forms and guides. See IL.gov which states:

2022 Illinois individual income tax forms will be available once the Illinois tax season opens for filing on January 23, 2023.

Turbo Tax program is using the expected forms and information. Once IL releases the information, that may unveil the issue.

You may want to review your last year's return and compare it to this year, just in case a wrong button got clicked. @Anonymous_ is right about carefully going through!