[header] How to tape and float drywall [title] Cover the nail or screw holes in the drywall. [step] Start with the top holes and move downward. [substeps] Fill the holes with premixed drywall joint compound using a 2-inch (5.1 cm) putty knife. 
Allow the putty to dry, then sand the rough points. Apply a second thin (but wider) coat using a 6-inch (15.