Is it possible to return a 2013 overpayment/refund check to the IRS in 2018, have it apply to 2016 estimated taxes AND be credited as of 2016 (similar to applying 2015 overpayment to 2016 est. tax)?
I note that 2016 was filed after the credit was made for the check but within the 3-yr statutory limit.
I need the payment to show as having been credited in 2016, not the date the check was returned.
IRS seems confused about this.
