Topology problem after merging verticies

my edges are curved and not smooth after merging some verts together.
please help. how do i fix?

Usually this happens when vertices aren’t actually merged.

Try selecting everything an using Ctrl + N to recalculate the normals, it might work

a) You’ve replied to the wrong person
b) Wrong shortcut for 2.8x
c) Don’t tell shortcuts, tell tools, where to find them without shortcuts, and what they do

Sorry wrong reply button

Try selecting everything and using the recalculate outside option