For paper receipts, just take photos of the receipts or scan them in. Then navigate to the Upload page (clickable from the left-hand side of your account). When you upload them into your account, you can then organized them in your account. You can also sign up for Shoeboxed Receipt Mail-In, a program where you send us your receipts in the mail, and we scan them in, organize them for you, and mail you your receipts back. Sign up here.
If you have old e-mail receipts that you want in your account, just forward them to your Shoeboxed e-mail address. The receipt will be added to your Shoeboxed account.
Click Here to View all the questions in Organizing Your Receipts category.