If you earned little or no income during your short stay in Wisconsin, you probably don't have to file a Wisconsin State Return as a Part-Year Resident.
Otherwise, you would Allocate a % of your income to Wisconsin based on time of residency (which you would have to calculate yourself), but the amount may fall below Wisconsin Standard Deduction amount of $2,000 for a Part-Year Resident/Non-Resident.
If not, here's more info on Allocating Income for a Part-Year Resident.
@Le_nene
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