be square (with one)

To no longer be in dispute or disagreement with one; to not be indebted to one anymore. Look, if you just help me get this job, we'll be square. Hey, are you square with Jim? I heard you two had a bit of a falling out. I helped Sarah set up the community center for her casino night in return for her helping me move, so we're square now.

be (all) ˈsquare (with somebody)

(informal)
1 have the same score in a competition: Liverpool were all square with Chelsea at half-time.
2 (of two people) not owe money (or anything else) to each other: Here’s a pound — now we’re square.