Georgia Retirement Income Exclusion

My nephew receives disability income from 100% veteran disability.  He's 42 years old.  It's not taxable, so nothing is entered on his federal return.  However, Georgia's Retirement Income Exclusion says he can exclude up to $35,000 of his retirement income (pension, not disability).  How/where in TurboTax does he  specify that he's disabled and eligible for this exclusion on his Georgia tax return?