It sounds like this is the amount of money the state sent you during the year.
U. Arizona Families Tax Rebate Enter the total amount of your 2024 Arizona Families Tax Rebate received during tax year 2024 that is required to be included in your Arizona Gross Income under the internal revenue code.
(from the Arizona Income Tax form 140 booklet).
If you have no idea how much rebate you have received, I think you should call the Arizona Department of Revenue to see if they know.