I have a huskee riding lawnmower model# is 13AP698G731. Is there a deck adjustment screw. I can see the deck is uneven on a flat surface and it cuts uneven.

Hi,
First thing to do is set the air pressure in the tires to 14psi front and 10psi rear. Does not do any good to do anything else until you have confidence in the levelness of the whole machine. Then on the left side there are two hangers and the front one is threaded and a ferrule attaches it to the deck. Take out the cotter pin and thread the ferrule up or down to level deck.
Peace,
Clarke