Remove any cushions, pillows and slipcovers and set them aside. Pull the couch several feet away from the wall. Ask an assistant to help you turn the couch upside down so you can access the legs. Unscrew the legs and set them aside.
Disconnect the sections of the couch, if you have a modular unit. La-Z-Boy modular sofas are connected by swing-arm latch brackets. Slide the arm into the unlocked position to release each bracket, then pull the couch sections apart.
Lift the bottom rear corners of the upholstery cover to expose the metal brackets inside the backrest. Release the levers of the brackets with the end of a screwdriver. With your assistant's help, lift the backrest out of the couch frame.