Doug Jones timely submitted his 2015 tax return and elected married filing jointly status with his wife, Darlene. Doug and Darlene did not request an extension for their 2015 tax return. Doug and Darlene owed and paid the IRS $124,000 for their 2015 tax year. Two years later, Doug amended his return and claimed married filing separate status. By changing his filing status, Doug sought a refund for an overpayment for the tax year 2015 (he paid more tax in the original joint return than he owed on a separate return). Is Doug allowed to change his filing status for the 2015 tax year and receive a tax refund with his amended return?