Change of mind
The listing that took the order also takes it back. Its order page starts the process and prints the labels.
How a return runs
Open the order on that listing, choose the item, and follow the steps there. The window, the conditions and the carrier arrangements are set on that page, and it states all three plainly.
The money travels back the same way it came in, on the timeline that page states. The desk has no lever in that machinery and no way to speed it.
Do not send anything to us
Our Schaumburg address is a desk, not a receiving dock. A can mailed there cannot be processed, cannot be logged against an order and cannot get your money moving.
Aerosol cans have their own carrier rules besides. The return process on the listing accounts for those; a padded envelope does not.