I don't know, I just returned a faulty smart light bulb and the process was beyond easy. Just select it from my previous orders, submit a request to return it, and choose how to send it back. Pretty easy.

As a "bonus" I was able to send it back through a Kohl's store so my wife got a 25% off coupon that she used to purchase some masks and socks (and stuff). Yes, I know, they got us to purchase more stuff, but she really likes shopping there and it was a "we're going there anyway" kind of thing. Plus I didn't have to box up the return or print a label or anything. Just show the clerk the QRCode and hand them the bare light bulb.