[TorUser827PlsNoBan]

Looking to return something and use FTID. I have never done this before and would appreciate help on how to get started.

I'd suggest using the search feature.
Plenty of guides on here on how to do FTID yourself without paying for a service.
Bobs guide is also a classic. (somewhat outdates)
Or pay one of these people. Let us know if they scam you.

General advice:
Start with something small (in price) that you don't mind paying for if it goes wrong.
I've never done FTID myself but the general principle relies on the mail courier making a mistake. So it's never 100%.