Navigation: Sign into the Back Office for your Retail Store. On the left-side Navigation Panel, click Settings. On the Settings page, under Retail POS click Refund and Exchange Period.
The Refund and Exchange Period Settings page enables you to configure the Time Period for Refunds and Exchanges.
Exchange Period - The number of days after a transaction that an item will be eligible for exchange. Enter the number of Days (or use the triangles to increase/decrease the value.

Refund Period - The number of days after a transaction that an item will be eligible for Refund. Enter the number of Days (or use the triangles to increase/decrease the value.

When ready, click Save at the upper-right. The confirmation banner will appear.
