If you qualify then the program will compute it automatically ... in the MY INFO section you will indicate who is disabled and then AFTER you have entered in ALL the income (taxable and non taxable) the credit will be calculated. Review the Sch R carefully to make sure you entered in all your income of all kinds. If your income is indeed low enough to get the credit these days then you don't have any tax liability for the credit to negate... it may be a hollow victory.
