As an Arizona taxpayer, you have a unique opportunity to direct your tax money to schools and charities you support and believe in. You have to make a donation upfront, but â provided you stay within prescribed limits â you get every dollar back in the form of a tax credit. If you make every possible donation, married couples filing jointly can give $4,965, and all other taxpayers can give $2,483 â and get it all back. You canât claim more than you owe in state taxes, but â with the exception of the Military Family Relief Fund Credit â unused credits can be carried forward for five years until used. Receipts should be retained and provided to your tax preparer.