Call Taurus, get a Return Authorization Number, they should send you a label, and the preferred method of shipping.
I used UPS for the Walther PPK/S recall, per S&W, but had to go to a main UPS terminal, the local UPS store wouldn't do it.
Include a letter with the pistol, name, address, email, etc,...list what happened. Include all broken part(s).
Usually, they don't even require mags for service.