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What do I have to do to get an extension for business income tax?
We grant an automatic extension of time to file your business tax return based on the return type and due date. This extension does not grant you an extension of time to pay any tax you owe. If you determine that you will owe tax, you must pay any tax you owe to avoid penalty and interest on tax not paid by the original due date of your return. We encourage you to pay electronically.
Form
|
Return Type
|
Payment Voucher
|
|---|---|---|
IL-1120
|
Corporation Income and Replacement Tax
|
IL-1120-V
|
IL-1120-ST
|
Small Business Corporation Replacement Tax
|
IL-1120-ST-V
|
IL-1065
|
Partnership Replacement Tax
|
IL-1065-V
|
IL-1041
|
Fiduciary Income and Replacement Tax
|
IL-1041-V
|
IL-990-T
|
Exempt Organization Income and Replacement Tax
|
IL-990-T-V
|
For further information, see the appropriate return instructions.