Question: what documents do you need to file business taxes?
Answer: Form 1040 or 1040-SR Schedule C, Profit or Loss From Business (Sole Proprietorship)
Form 1040 or 1040-SR Schedule F, Profit or Loss From Farming.
Form 1065, U.S. Return of Partnership Income.
Form 1120, U.S. Corporation Income Tax Return.
Form 1120-S, U.S. Income Tax Return for an S Corporation.