During the administration of President George W. Bush, there was a controversy over the President's use of signing statements, which critics charged was unusually extensive and modified the meaning of statutes.
Wisconsin Filing Due Date: Corporation tax returns are due by March 15 â or by the 15 th day of the 3 rd month following the end of the taxable year (for fiscal year filers). Extended Deadline with Wisconsin Tax Extension: If you have an approved Federal tax extension (IRS Form 7004), your Wisconsin filing deadline will be automatically extended to 30 days past the Federal extension deadline.
You will need to file a Wisconsin tax amendment form if you need to make any changes to your Wisconsin return or if you made changes to your federal return that affects your Wisconsin return.Here are your two options to file an amended Wisconsin tax return:1  Download and complete Form 1X (residents) or Form 1NPR (nonresidents and part-year residents) yourself. 2  When you're done, print out the form and mail it to: Wisconsin Department of Revenue, P.O. 3  Box 8991, Madison WI 53708-8991 OR.ere are your two options to file an amended Wisconsin tax return: 1  Download and complete Form 1X (residents) or Form 1NPR (nonresidents and part-year residents) yourself. 2  When you're done, print out the form and mail it to: Wisconsin Department of Revenue, P.O. 3  Box 8991, Madison WI 53708-8991 OR.