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What are the electronic options for filing and paying business income and replacement tax?
- MyTax Illinois – To use this option, log in to your MyTax Illinois account. If you do not have a business account registered with the Illinois Department of Revenue (IDOR), you must register your business before you can make a payment through MyTax. To register your business through MyTax, select the "Register a New Business (REG-1)" link in the Register Panel and complete Form REG-1, Illinois Business Registration Application. If you already have a business account with IDOR but do not have a MyTax Illinois account, select "Sign Up" on the MyTax Illinois homepage to create a MyTax Illinois logon.
- Third-Party Software / Modernized e-File (MeF) through the IRS – You may send a return payment, extension payment, or estimated payment as an ACH Debit, in a single transmission with or without your return.
- ACH Credit – Contact 217-782-6257 for more information.
You can electronically file Forms IL-1120, Corporation Income and Replacement Tax Return; IL-1065, Partnership Replacement Tax Return; IL-1120-ST, Small Business Corporation Replacement Tax Return; IL-1041, Fiduciary Income and Replacement Tax Return; and any attachments and payments through our partnership with the IRS Modernized e-File (MeF) program using third-party software. MeF is a web-based system that allows electronic filing of tax returns through the Internet and uses the widely accepted Extensible Markup Language (XML) format.
Linked and unlinked federal/state returns, schedules, and payments may be filed through MeF. The Illinois MeF program will accept and process the three most recent years of business income tax returns on a rolling calendar basis.
See BTR-36, Implementation Guide for Business Income Tax Federal/State Electronic Filing Program, for a list of returns and tax years that may be filed through MeF, program requirements, and more information.
There are three electronic options to make payments for business income tax.