In the alternative, you can wait for the summons that will arrive shortly after your landlord files for eviction. When you get the summons, note the date of the hearing and be sure to follow instructions. If you do not answer the summons, default judgment may be entered for your landlord - meaning you lose. In order to get a trial, you must respond to the summons. At trial you will be allowed to file any counterclaims you have against your landlord.
If you have reached this point in the eviction process, you may wish to seek the advice of an experienced Wisconsin evictions lawyer to help you defend against the eviction or to advise you as to any rights you may have with respect to the circumstances surrounding the termination notice and the unlawful detainer action.