When you are placing an order on the website, you upload your artwork after the order has been placed and paid for, at the very end of the checkout process! This way your artwork will be attached to your order. Your designs will then be set up by our dedicated Artwork team and they'll be straight in touch if there are any queries or problems with the designs.
If you have already placed an order and need to provide some updated artwork, you can email the artwork over to our Customer Experience team at email@example.com. We can accept up to 20MB over email, so if your file is larger than this please use our WeTransfer channel here - https://awesomemerch.wetransfer.com/