The Arizona Department of Revenue has a message: file taxes by Tuesday.

April 18 is the tax deadline and also is the first-quarter deadline for those who file individual estimated tax payments quarterly, according to an ADOR release.

In Arizona, full-year residents or part-year residents  must file a tax return if they are:

• Single or married filing separately and gross income is greater than $12,950.
• Head of household and gross income is greater than $19,400.
• Married and filing jointly and gross income is greater than $25,900. 

For non-resident individuals, the threshold numbers are prorated based on the individual's Arizona gross income to their federal adjusted gross income, state officials said.

To expedite the processing of a return and reduce errors, ADOR encourages taxpayers to e-file.

Taxpayers submitting a paper return can expect to wait 8-10 weeks for processing. E-filed returns take on average two weeks, officials said.

ADOR tips to avoid delays in processing returns:

• Submit all the same individual income tax year forms together. Do not use the front page of the current tax year form and include it with a different tax year form or cross out the tax year and mark another tax year. 
• Make certain key fields like first and last name, address, filing status and tax ID number or Social Security number are entered and correct in all appropriate boxes.
• Verify all the necessary lines and forms are filled out, then correct information or miscalculations.
• Ensure all forms, carryover totals and supporting documents are correctly stated and included, such as tax credit codes, recapture credit forms, schedules and continuous pages.
• Look over all income, withholding and payments to ensure they are reported accurately.
• Double-check bank routing and account numbers used on tax forms. Taxpayers are responsible for the information. 
• If sending a paper return, use the fillable forms and print with black ink on white paper to reduce ADOR keying errors that may occur when interpreting handwriting. 
• Make sure to send the ADOR payment with your state return to the correct ADOR P.O. Box and the IRS payment with your federal return sent to the IRS address.
• Ensure the paper check contains the written amount on the amount line and amount box, along with the tax identification numbers and tax period on the check memo line. When sending a payment, ensure it is sent with the original tax return or a payment voucher so it can be applied to the correct account and tax period promptly. 
• Remember to sign and date the return.