grammar - How can I say "Do something in exchange" in a different way?

I'd like to know alternative ways to say: "Do something in exchange" when someone helps me. If possible can you guys give me three or more examples?

For example,

"Thanks for helping, what can I do in exchange?"

Could I say "Do something back" (I don't know if it's grammatically right) to show my appreciation.

Thanks in advance.

Answer

Is there something I can do in return?

[do] something in return Thesaurus.com