The IRS has the answer you are looking for: Form 1120/1120S/1120-F e-file The option to file Form 1120 is limited to tax preparers and large businesses who have obtained prior IRS approval to file Form 1120 electronically. A list of approved software products for preparing and filing Form 1120 electronically can be found here: Tax Year 2022 1120x MeF Providers. Note that you must have prior approval from the IRS to file Form 1120 electronically, either for your own business or on behalf of clients. Many corporate tax preparers will have obtained this authorization and will be glad to file your return electronically for you as part of their tax preparation service.Generally speaking, you will not find for sale to the public software that will allow you to electronically file Form 1120. Form 1120 is a much more complicated form than Form 1040, and the IRS has not consented to allowing electronic filing of this form by nonprofessionals assisted solely by software.