>>3010914
Wall mud/drywall filler

>>3010914
Fill, sand, paint. If it's split pretty bad, maybe glue and clamp, maybe send long finish screws straight through to hold things in place then repeat step one.

>>3010914
Do you own this door? If you don't, kick it several times on the outside and claim someone tried to bust the door in.

>>3011002
this.
go all in OP

Push (or clamp) the door jamb back in place, then put a bunch of screws through it into the stud behind it. Then reattach the door casing. Then repaint all of it. If you require more of an explanation than this, then doing it is beyond your capabilities.

>>3010914
Is this because of domestic violence?

>>3010914
Do what your landlord would do and just drench white paint over it.