Yesterday the IRS advised veterans that they may be eligible for a refund if they received a one-time lump-sum disability severance payment after 1991. Veterans must submit an amended tax return to claim the refund within one year of receiving notification from the Department of Defense about their eligibility for a refund. Generally taxpayers can only receive refunds within three years from the due date of a tax return, but the IRS has granted this exception because of the Combat-Injured Veterans Tax Fairness Act.