How long the customer has to make a return after the product has been delivered.
Where to find it
Settings > Returns > Policies, under Return Policies.
[Screenshot: Policies tab — Return window field]
What this is
Enter a number of days. The clock starts at delivery, not the order date — a customer who waited two weeks for shipping gets their full window either way.
Items past the window appear as ineligible in the portal, with a note explaining why.
Considerations
Thirty days is the most common default and what most shoppers expect.
Seasonal or trend-driven products lose resale value quickly, which argues for a shorter window.
Some jurisdictions mandate a minimum — the EU right of withdrawal is 14 days from receipt.
Update your return policy page whenever you change this value.
Common exceptions
Holiday window — extend for orders placed in November and December so gifts bought early are still returnable in January
Shorter on sale items — match on a product or order tag
Longer for specific customers — match on a customer tag
Related settings
Return eligibility — the other main source of ineligibility
Return Policy URL — keep the published policy in sync