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Approved Third Party Software Vendors for Business Income Tax (BIT)

If you choose to have a third-party file your return or payment, you may wish to choose from the following software vendors currently approved by the department to electronically file some or all Illinois business income tax returns, corresponding forms, and schedules. Third-party software also supports electronic payments.

Note: Software vendors are deemed approved after they register and have their product approved through testing. These companies may be web-based companies or traditional software development companies that produce a product for the purpose of formatting and transmitting electronic returns and payments.

Advanced Tax Solutions, LLC
Product Name: MyTaxPrepOffice
Website: www.mytaxprepoffice.com
Customer Service Phone: 307-414-1211
Customer Service Email: dor@advanced-taxsolutions.com
CCH, Inc., A WoltersKluwer Company
Product Name: ProSystem fx
WebSite: www.prosystemfx.com
Phone: 800-739-9998
CCH, Small Firm Services
Product Name: ATX
Website: www.atxinc.com
Phone: 866-345-4171 (sales)
800-638-8291 (support)
CCH, Small Firm Services
Product Name: TaxWise
Website: www.TaxWise.com
Phone: 866-345-4171
Corptax, Inc.
Product Name: CSC Corptax
Website: www.corptax.com
Phone: 800-966-1639

Crosslink Professional Tax Solutions
Product Name:  Crosslink
Website:  www.crosslinktax.com
Phone:  800-345-4337

Drake Software, LLC
Product Name: Drake Software
Website: www.drakesoftware.com
Phone: 828-524-8020 (support)
800-890-9500 (sales)
H&R Block, Inc.
Product Name: Blockworks
Website: www.hrblock.com
Phone:  800-472-5625
Intuit
Product Name: Lacerte Software
Website: www.lacertesoftware.com
Phone: 800-765-7777 (sales)
800-933-9999 (support)
Intuit
Product Name: Intuit Tax Online
WebSite: www.taxpro.intuit.com/tax-online
Phone: 800-934-1040 (sales)
800 434-6818 (support)
Intuit
Product Name: Pro Series
WebSite: www.Proseries.intuit.com
Phone: 800-934-1040 (sales)
800-434-6818 (support)
On-Line Taxes, Inc.
Product Name: OLTPRO Professional Tax Software
Website: www.OLTPRO.com
Phone: 816-232-9095 (support)
877-OLT-4-PRO (sales)
Tax Technologies, Inc.
Product Name: Tax Series
Address: 196 Woods Avenue, Bergenfield, NJ 07621
Website: www.taxtechnologies.com
Email: support@taxtechnologies.com
TaxAct, Inc.
Product Name: TaxAct
Website: www.taxact.com
Phone: 800-573-4287 (support/sales)
TaxSlayer Pro
Product Name: TaxSlayer Pro
Website: www.TaxSlayerPro.com
Phone: 888-420-1040 (sales)
706-868-0985 (support)
Thomas Reuters
Product Name: Onvio Tax CS
Website: https://onvio.us/login/#/

Thomson Reuters
Product Name : UltraTax CS
Website: https://tax.thomsonreuters.com/us/en/cs-professional-suite/ultratax-cs
Phone: 800-968-8900
Thomson Reuters Tax and Accounting
Product Name: Gosystem Tax
Website: https://tax.thomsonreuters.com/us/en/cs-professional-suite/gosystem-tax-rs
Phone: 800-865-5257
Thomson Reuters Tax and Accounting
Product Name: ONESOURCE Income Tax
Website: https://tax.thomsonreuters.com/en/onesource
Phone: 800-865-5257


For questions regarding this program, please contact the Electronic Commerce Division at 1-866-440-8680.

Note: Some taxpayers are required to pay their tax electronically using Electronic Funds Transfer.