If you qualify, go back into your AZ and return to the credits section. Only credits for which you qualify will populate. Generally, people that qualify will not be filing a tax return due to income limits. For 2021, the qualifications from AZ instructions (Download), page 24:
Line 57 - Property Tax Credit You may claim the property tax credit if you meet all of the following:
• You were either 65 or older in 2021 or, if under age 65, you were receiving SSI Title 16 income from the Social Security Administration.
• You were an Arizona resident for the full year in 2021.
• You paid property tax on your Arizona home in 2021. You paid rent on taxable property for the entire year or you did a combination of both.
• If you lived alone, your total household income was under $3,751. If you lived with others, the total household income was under $5,501.
To see what income is included in household income, see the Form 140PTC instructions(Download).
If you do qualify and the program is not letting you, it could be some income is not being subtracted, like Social Security, to determine the credit.
You can send us a “diagnostic” file that has your “numbers” but not your personal information. If you would like to do this, here are the instructions:
If you are online, go to tax tools>tools > share file with agent > 6 digit number pops up.
If on desktop, go to online >send tax file to agent > number pops.
Reply with # here and @AmyC please
