I have a craftsman riding mower and the deck cuts uneven . I need a suggestion on help fixing it,matthew

New blades. There usually is a adjustment, check manual. Call sears, there should be some kind of help line. If you don't have a manuel Sears charges 6$ for replacements.
Do you have the wheels on the deck, some times the wheels are adjustable, but if you don't have them you need them. Sears used to sell a deck leveling kit in the stores. It is not hard to do, basically there is a nut located between the deck and the mower that you turn until your level says it is even.

The decks are fairly light steel and if you have hit anything hard it will tweek the deck where the blade spindle comes through. Take a tape and measure the distance from the top of the blade to the inside top of the deck, mark the spot and rotate blade to other side. Same measurement? If different the deck is tweeked.

Don

You can buy the deck leveling kit on eBay. Just search it. I just bought one.

You also need to check for bent blades, or the bearings in the spindle assembly may be going bad allowing "slop" in the movement.