We advise making all payments via the online systems at the links provided below for federal, Illinois, and Arizona. All other state payments should be made through the respective states’ website.

If you must mail your payments, we recommend mailing via certified mail and retaining proof of mailing & delivery receipt.

Please contact your Apex Client Advocate for additional assistance.

To process PERSONAL IRS federal, Illinois or Arizona estimates:

IRS Individual Tax Payment Portal

IRS Individual Tax Payment Instructions

Illinois Individual Tax Payment Portal

Illinois Individual Tax Payment Instructions

Arizona Individual Tax Payment Portal

Arizona Individual Tax Payment Instructions

To process BUSINESS (1120/1065) PTE Illinois or Arizona estimates:

Illinois Pass-through Entity Tax Payment Portal

Illinois Pass-through Entity Tax Payment Instructions

Arizona Pass-through Entity Tax Payment Portal

Arizona Pass-through Entity Tax Payment Instructions

IMPORTANT UPDATE REGARDING ILLINOIS PAYMENTS

Taxpayers wishing to utilize United States Postal Service (USPS) tracking services (i.e. Priority Mail, Certified Mail, Registered Mail) for Vouchers IL-1040-ES, Estimated Income Tax Payments for Individuals, and IL-1040-V, Payment Voucher for Individual Income Tax should use the following mailing address:

ILLINOIS DEPARTMENT OF REVENUE

101 West Jefferson Street

Springfield, Illinois 62736-0001

If you send your voucher payment via 1st class or standard mail, please use the address provided on the IDOR tax vouchers:

Illinois Department of Revenue

Springfield IL 62736-0001

If you have any questions about your payment please reach out to your Client Advocate.