If you received a letter from the IRS or the state of Wisconsin, please make that letter available to us as soon as possible. Letters can be dropped off or mailed.
January 15, 2021 – 4th quarter estimated tax payments due
February 12, 2021 – IRS Efile to go live
First Week of March – Tax refunds begin reaching those claiming EITC and ACTC
March 15, 2021 – S Corporation and Partnership returns due
April 15, 2021 – Deadline for filing 2020 tax returns or requesting an extension
1st quarter estimated tax payments due
June 15, 2021 – 2nd quarter estimated tax payment due
September 15, 2021 – 3rd quarter estimated tax payment due
October 15, 2021 – Deadline to file extensions