Wolters Kluwer, CCH 9111 E Douglas Ave. Approved software developers for corporation tax e-file Software developer The Main forms approved for tax year 2020 column lists all forms that the software developers tested and approved for tax year 2020 only. The software developers and products in the chart below are approved for corporation tax e-file. Tax Department testing does not imply that we endorse the quality of the software (see also Important Information Regarding Electronic Filing). Our testing process ensures tax returns are properly formatted and can be processed when we receive them. We were the first available tax software for Macintosh computers, and one of the first to support electronic filing of returns - making us your best choice in Canadian tax software Go Modern. To participate in the New York State e-file program, you must use tax preparation software that has been tested by the Tax Department. TaxTron has been helping Canadians just like you prepare their own tax returns for over 20 years. Approved software developers for corporation tax e-file