Does an extension apply for contributions to a Wisconsin college savings account?.Does the May 17, 2021, extended due date extend the due date for filing a claim for refund on a 2016 calendar-year individual income tax return from April 15, 2021, to May 17, 2021?.The overpayment will get applied to the estimated tax payment due on April 15, 2021, as if a payment was received on such date.
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Is Wisconsin following the extended due dates for filing 2020 individual income tax returns as provided in the IRS notice?.