I moved to Arizona in March of this year 2021 from Washington state. When do I have to start paying stat taxes to AZ I also keep a Wa address on hand at my Daughters home

You must start paying taxes to Arizona (AZ) when you became a part year resident and established your domicile in AZ.  

Part-Year Resident Personal Income Tax Return.

• You are a part-year resident if you did either of the following during 2020:
  • • You moved into Arizona with the intent of becoming a resident.
  • • You moved out of Arizona with the intent of giving up your Arizona residency.

Your income for AZ will begin in March when you began your residency.  You can view forms here.

 

Where Should I Mail My Return?

• If you are including a payment with this return, mail the return to:
  • Arizona Department of Revenue PO Box 52016 Phoenix, AZ 85072-2016
• If you are expecting a refund, or owe no tax, or owe tax but are not including a payment, mail the return to:
  • Arizona Department of Revenue PO Box 52138 Phoenix, AZ 85072-2138

Since you moved to Arizona permanently this month (March of 2021), all your income for the rest of this year will be taxable by AZ.  You should ask your employer to begin withholding AZ taxes from your pay.

So I just fill out that Az state tax form and send it to them and they can do the rest I take it?

Yes, your employer should supply you with AZ Form A-4, Employee’s Arizona Withholding Election, which you fill out and return to them.