TURBOTAX IS USING THE WRONG AGI LIMIT IN CALCULATING MY DEDUCTION

I DONATED CAPITAL GAIN PROPERTY (STOCK) TO A 501 C 3 QUALIFIED  60/30% ORGANIZATION.  THE TT SOFTWARE IS USING  A 20% AGI LIMIT WHICH RESULTS IN A HIGHER TAX LIABILITY. HOW DO I GET THE SOFTWARE TO RECOGNIZE THE CORRECT 30% LIMIT ORGANIZATION?