Score the caulk line along the top edge with a utility knife
Remove any paint seal with the utility knife
Locate and mark any nails or screws
Pry off shoe molding first if present
Insert a putty knife behind the baseboard to protect the wall
Gently work a pry bar or trim puller behind the board
Pry at stud locations to loosen the nails
Move along the board and repeat until it releases
Pull the baseboard away from the wall
Remove any remaining nails from the wall or trim
Patch nail holes and repair wall damage as needed