At the bottom of the tax services page
If you donate cash, insure that the recipient is a 501(c) (3) organization. Not all are and you cannot deduct for ones that are not. Exceptions here are religious organizations. But you still need a receipt. Also, Look at all the Tax credits offered by Arizona. Private Tuition organizations, public schools, Working poor and others. Community Food bank, various rescue missions. there is certainly someplace to donate to that would be worthwhile and pay your Arizona Tax Bill. These credits have a varying amount of deductibility, from $400.00 to $2100.00.
Remember to save enough money to pay the self-employment tax of 15.3% on your net earnings. Nothing like getting slapped with a $15,000.00 to $25,000 tax bill in January. Create a log of daily mileage and expenses.
Print W-9 Forms and have everybody you pay money to fill out. You need this at end of the year to provide W-2 and 1099 forms.
Maintain separate accounts.. Business and personal. Easier to establish that you are a business…NOT A HOBBY