Can I return a 4 year old couch to Costco?

Hello there, I'm curious about something. I've got a couch at home that's been with me for four years now, and it's from Costco. Now, I'm wondering, is it possible to return this couch back to Costco, even though it's already been four years since I bought it? I mean, they have that amazing return policy, but I'm not sure if it applies to furniture that's been in my possession for such a long time. What do you think? Is there any chance I can still get a refund or exchange for this couch? Thanks for your help!