If you haven’t recorded any document to transfer the title to your property since your marriage, the name reflected on the tax bill and assessment notice will be the same as listed on the conveyance where you took title.  To change the ownership, you may contact an attorney to prepare the documents.  Or, if you feel comfortable doing it yourself, you may download the deed forms from the Wisconsin state bar website at https://marketplace.wisbar.org/Books/Online-Forms.