S Corporations – File a 2022 calendar year income tax return (Form 1120S) and pay any tax due. Provide each shareholder with a copy of Schedule K-1 (Form 1120S), Shareholder’s Share of Income, Credits, Deductions, etc., or a substitute Schedule K-1. If you want an automatic 6-month extension of time to file the return, file Form 7004 and deposit what you estimate you owe in tax. Then file the return, pay any tax, interest, and penalties due and provide each shareholder with a copy of their Schedule K-1 by September 15.