E-filing forms

Forms included in the e-file

The Illinois Department of Revenue and UltraTax CS/1065-IL support electronic filing for the following forms:
  • Calendar year returns
  • Fiscal year returns
  • Extensions (IL-1065-V)
  • Estimates (IL-1065V)
  • PDF attachments are allowed
Electronic filing is supported for the current year and 2 prior years only.

Forms not supported for e-filing

The Illinois DOR doesn’t support electronic filing for the following types of forms:
  • Amended returns
  • Short year returns

Payment methods

Illinois DOR supports payment information in the electronic file and a balance due can be made by electronic funds withdrawal (EFW). Payments can also be made via check or electronic funds transfer (EFT). Note that if the payment exceeds $20,000 then EFT is required. Direct deposit is also available for any refunds.
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