If you are in Wisconsin now, you need to establish residency in Wisconsin to file a divorce. You must have lived here for at least 6 months prior to filing and for at least 30 days in the county. Regarding the grounds for divorce, Wisconsin is a no fault state, so you don't need a reason to get divorced.
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Attorney Kluck's analysis is correct in almost all jurisdictions; in other words, and I am unsure who stated 'you should be separated for a year' (as it does not sound like a legal requirement), though once you are a resident of a state (whatever its residency requirements, as stated under statute), you may initiate a dissolution proceeding on the facts you assert whether it is a fault or no-fault divorce state. Contact a family law attorney in the state in which you are a resident, provide all the details of your marriage (i.e., date, location, etc.) and inquire as to what is necessary (besides personal jurisdiction upon your estranged husband - the lawyer will explain to you how to obtain such) to have a court grant you a divorce. Good luck.
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