Like the title says, how can you figure out what chord resolves to what chord?
Use your ears.
alott of it is cadences but then if you have a seventh chord the 7th has to resolve upward by a half step
Let's say you're in the key of C major. Every single chord except C major resolves to C major.
Check out some Harmony books. There are tons of rules about progressions and resolutions, some more complicated than others!