@Steverino78 A mailed federal or state tax return is sent to the normal address for each tax return. Just because an extension request was filed does not mean the tax returns have to mailed to a different address.
Go to this IRS website for where to mail a federal tax return, with or without a payment, by state - https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment
Go to this Wisconsin Department of Revenue website for the state tax return mailing address, with or without a payment - https://www.revenue.wi.gov/Pages/FAQS/pcs-mail.aspx#mail1
