Reject Code: 0501
M1 line 1 must equal federal adjusted gross income.Xpath: M1 Line 1: ReturnState/ReturnDataState/FormM1/FederalAdjustedGrossIncomeAmt
A Minnesota individual income tax return will get this reject if, after it having been created, a change was made on the federal return but the Minnesota return was not opened for it to update.
To fix this reject in TaxSlayer Pro, simply open the MN return for it to update. You can then exit the return entirely and transmit the Minnesota return "state only".