- If you own a sole proprietorship or single member LLC, file your business taxes on Schedule C and add your business income/loss to your personal tax return.
- For a partnership or multiple-member LLC, file an information return on Form 1065 and issue Schedule K-1s to partners to add to their personal tax returns
- For a corporation, file form 1120 with the IRS; review the information needed to complete this form before you go to your tax preparer
- For an s corporation, file form 1120-S and provide a Schedule K-1 to shareholders for their personal returns.
If you are a corporation, use Form 1120-W to estimate your taxes due.
If you have a limited liaiblity company, in some circumstances you may want your business to be taxed as a corporation. Read about this entity election here and use Form 8832 to file this election.