We revoked your subchapter S election. What you need to do File Form 1120, PDF U.S. Corporation Income Tax Return (PDF), by the required due date. You may want to Keep this notice for your permanent records. Frequently asked questions Can I re-elect subchapter S status? You must wait five years before you're eligible to make a new election. Tips for next year File Form 1120 by the required due date. Consider e-filing. IRS providers and large businesses authorized to participate in IRS e-file can file Form 1120, Form 1120S, U.S. Income Tax Return for an S Corporation, and Form 1120-F, U.S. Income Tax Return of a Foreign Corporation, through Modernized e-File (MeF). Visit Form 1120/1120S/1120-F e-file for more information about MeF. Reference Tools Form 1120, U.S. Corporation Income Tax Return PDF Instructions for Form 1120 PDF Full list of tax forms and instructions Need Help? You can authorize someone to contact the IRS on your behalf. See if you qualify for help from a Low Income Taxpayer Clinic. If you can’t find what you need online, call the IRS number at the top of your notice or letter.