Providers that are listed on this page are approved IRS Modernized e-File (MeF) providers; however, they are not part of, nor do they have any special relationship with the Internal Revenue Service. The following companies have passed the IRS Assurance Testing System (ATS) requirements for software developers of electronic corporate returns for tax year 2024. Meeting the requirements means that the software can provide correct data in the proper format for processing by IRS systems. It does not mean that a software package includes every possible schedule or attachment, or that it will meet the needs of all filers. It is the filer's responsibility to contact the provider to determine if the software meets their needs. The providers are not listed in any particular order. Corptax, Inc. 2100 E. Lake Cook Road, Suite 800, Buffalo Grove, IL 60089, 800-966-1639 Lacerte Software 5604 Headquarters Dr. Plano, TX 75024, 214-387-2000 Tax Technologies, Inc. 196 Woods Ave, Bergenfield, NJ 07621, 866-239-4884 ProConnect Tax Online 5601 Headquarters Dr. Plano TX 75024, 214-387-2000 Thomson Reuters - UltraTax CS 6300 Interfirst Drive, Ann Arbor, MI 48108, 800-968-8900 TaxAct, Inc. - Business 3200 Olympus Blvd. Suite 150 Dallas, TX 75019, 319-373-3600 Instead 515 Folsom St, 2nd Floor, San Francisco, CA 94105, 415-808-5914 Advanced Tax Solutions, LLC 1603 Capitol Ave, Suite 310 A254, Cheyenne, WY 82001, 307-414-1211 Crosslink Professional Tax Solutions, LLC 16916 S. Harlan Road, Lathrop, CA 95330, 800-345-4337 Taxware Systems, Inc. 195 N. Euclid Ave, Suite 201, Upland, CA 91786, 909-931-3131 TaxAct, Inc. - Professional 3200 Olympus Blvd. Suite 150 Dallas, TX 75019, 319-373-3600
