Federal Corporate Income Tax

If a business’s fiscal year corresponds to the calendar year this is due by March 15.

C-Corporations file form 1120 to pay income tax.  Limited liability companies classified as corporations must also file this form.  LLC that are sole proprietorships can file a Schedule C of the 1040 series to report income.  Generally an S-Corporation is not liable for federal income tax, but needs to file form 1120S.  Some investment income and capital gains is taxed.