S-Corporation (1120S) and Partnership (1065)
Business Tax Returns
Income Tax filing due date is March 15th
To file by the due date, please send us your financial statements (Profit & Loss, Balance Sheet, General Ledger, or income and list of expenses) no later than February 21st.
We are happy to file an extension on your behalf. However, there is no extension for the IL corporate tax payment. We need to know your estimated Profit and will file the extension with the payment.
Please provide your estimated profit no later than March 7th.