When personalizing your card, after you approve your design or request edits and click "Next", you'll be taken to a page where you'll choose your card thickness and trim. The following page will allow you to choose your envelope options. Under the Shipped To You section, choose the second option "Printed return address". Different design options will populate for you to choose from and you'll see a preview of the envelope design on the main page.
Once you've selected printed return address, you'll see a field to enter your return address. Enter your address the way you'd like it to appear, then click "add to cart" and all your envelopes will come with printed return addresses.
If you've already added your card to your cart, click "Edit Options" on the dropdown and follow the same process to update to return addressed envelopes.
If you have further questions, please contact us and our support team will be happy to assist!