Filing Information For Corporations
Employer ID Numbers (EINs)
Find out more on EINs or apply for one online.
Federal income tax, Social Security and Medicare taxes, FUTA, self-employment tax and more.
A partnership is the relationship existing between two or more persons who join to carry on a trade or business.
e-file for Large Business and International (LB&I)
Certain large business and International (LB&I) corporations are required to electronically file their Forms 1120 and 1120S. Other corporations may do so voluntarily. This site provides e-file information for corporations that prepare and transmit their own electronic corporate income tax returns and those that use the services of third party tax professionals.