The IRS has extended the US tax return due date, IRA contributions deadline and taxes due to July 15, 2020. The IRS considers a tax return filed on time if it is addressed correctly, has enough postage, and is postmarked by the due date.
The state of Arizona has extended the date to July 15, 2020 for filing and paying Arizona taxes due. Arizona does have a quirk. Arizona wants the return received (along with any payments) by July 15, 2020, therefore you must mail your Arizona return well in advance of the due date for it to be received on time.
Taxpayers should check with their individual states to determine if the state has amended its filing due date and other requirements.