How does tuition reimbursement works?

I found out Alorica along with other companies offers this but I'm still quite confused on how does this work. Isn't it a golden rule for every working student applicant to never disclose that you're studying?

After I get an experience with my current company, I plan to apply to alorica right after because they have TR. I will be studying BS Accountancy in college next year, so is it possible that they will support me through this?

And do I have to do something like return service to repay them?