i was trying to create my first room art , i started with a cube , deleting its one vertex , then i extruded three faces , finally , i started to model a sofa , but then i figured this bad topology at the corner of the sofas hand-rest
i tried to fix by changing the technique of miking it , earlier i made by extruding the face , but then i also tried extruding edges , but the problem doesn't seem to vanish , here is a better shot in edit mode