Providers 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 2020. 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. Thomson Reuters - ONESOURCE Income Tax 2395 Midway Road, Carrollton, TX 75006, (800) 865-5257 Drake Software 235 East Palmer Street, Franklin, NC 28734, (828) 524-8020 Thomson Reuters – Onvio Tax 6300 Interfirst Drive, Ann Arbor, MI 48108, (800) 968-8900 TaxAct, Inc. 1425 60th Street NE, Cedar Rapids, IA, 52402, 319-373-3600 CrossLink Professional Tax Solutions, LLC 16916 S. Harlan Road, Lathrop, CA 95330, 800-345-4337 TaxAct, Inc.- Professional 1425 60th Street NE, Cedar Rapids, IA 52402, 319-536-3571 Corptax, Inc. 2100 E. Lake Cook Road, Suite 800, Buffalo Grove, IL 60089 (800) 966-1639 On-Line Taxes, Inc. 724 Jules Street, St Joseph, MO 64501, 816-232-9095 Tax Technologies, Inc. 196 Woods Ave, Bergenfield, NJ 07621, (678) 574-2160 Intuit, Inc. - ProSeries 7535 Torrey Santa Fe Rd, San Diego, CA 92129, 800-934-1040 Thomson Reuters - GoSystem Tax 2395 Midway Road, Carrollton, TX 75006, (800) 968-8900 Thomson Reuters - UltraTax CS 6300 Interfirst Drive, Ann Arbor, MI 48108, 800-968-8900 Taxware Systems Inc. 924 W 9th Street, Upland, CA, 91786 (909) 931-3131 H&R Block One H&R Block Way, Kansas City, MO, 64105, 800-HRBLOCK/800-472-5625 Wolters Kluwer – ATX 225 Chastain Meadows Court NW Suite 200, Kennesaw, GA 30144, (770) 857- 5000 Profit Developers, Inc. P.O. Box 7280, Port St. Lucie, FL 34985 (772) 337-2921 Intuit, Inc. - TurboTax 7535 Torrey Santa Fe Rd, San Diego, CA 92129, 800-934-1040