Dumb RMA question

I bought this charger for my laptop off ebay... and surprise surprise it doesn't work anymore. I contacted the seller and they offered me an exchange and even gave me a paid UPSP shipping label to ship the dead one back. Now my question is, where do I drop it off? I'm in Canada and obviously there's no UPSP here Any fellow Canadians (or others ) want to shed some light? Never had to RMA anything before.... so I'm -slightly- lost Thanks!

Vancouver B.C.? Make a quick drive down south and drop it off here in Washington.