Is a will written on forms from the Internet legal in Wisconsin?

You can prepare your own will. The requirements are set out in Section 853.03 of the Wisconsin statutes.
(http://tinyurl.com/yjpzohg) The issue is whether the will that you prepare will be best suited to your situation. I encourage you to get the adivce of a competent estate planning attorney. The value of the counsel that you will get will be well worth the fee.

This information is not intended to substitute for professional legal advice and does not create an attorney-client relationship. You should accept legal advice only from a licensed legal professional with whom you have an attorney-client relationship.