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Approved software vendors for corporate returns

The following companies have passed the Oregon Assurance Testing System (ATS) requirements for software developers of electronic corporate returns. Meeting the requirements means that the software can provide correct data in the proper format for processing by both the IRS and Oregon 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.

Providers are listed in no particular order:

​Company name ​Software name
​CCH, a Wolters Kluwer Business Prosystem FX
​Corptax Inc. Corptax
​CCH Small Firm Services ​ATX/MAX
TaxWise

Vertex, Inc. Vertex Income Tax Domestic
​CS Professional Suite & Enterprise Suite UltraTax CS
​TaxACT TaxACT
​TaxSlayer TaxSlayer Pro
​Intuit Lacerte Professional
ProSeries Professional
Intuit Tax Online
On-Line Taxes, Inc.
​OLTPRO Professional Tax Solution
​Drake Software ​Drake Software
​Thomson Reuters Tax & Accounting GoSystem Tax
ONESOURCE Income Tax
​Tax Technologies, Inc. ​Tax Series
H & R Block​ BlockWorks