I've noticed it depends on the seller on how it gets shipped back. Some don't even use Kohls and yep I have one near me too. The ones that offer Kohls for free, would charge for UPS, and the reverse applies. And sometimes I'm offered Staples other times, nope.. Started to notice a pattern of the stuff I order and return.
I did notice a long refund time with Kohls, sometimes they didn't even get the return back. Now when returning to Kohls, Amazon is asking what locationg I would return it to. Think they're tracking the progress of the return, must have had a lot of returns disappear on the way back to Amazon..
But you're asking about WF, I got the refund a day later when I returned to WF. But that wait line was nearly a half hour! wow..