Tack.
Thank you.
Tack så mycket.
Thank you so much.
Tack så mycket, jättesnällt.
Thank you so much. (formal)
Varsågod.
You are welcome.
Ingen fara.
It’s ok/(there is) no danger
Reference
- https://www.swedishpod101.com/lesson/learn-swedish-in-three-minutes-2-swedish-manners