By going to the Tools page and the Voucher section, where you can browse and manage Vouchers. Follow these steps:
1. Go to the Tools page and click Vouchers
2. Check the status of your vouchers:
If has a tick, then it's still valid
If it has a cross, then it has expired
3. To find a specific voucher, search for the Coupon code at the top of the page
4. Click into a Voucher to see transactions that have used the voucher. Click the Transaction ID to be taken to the Order page
5. On the Order page, scroll down to the basket to see details. Click View to see the Voucher details