You can upload your file immediately after ordering in step 4 'Upload artwork'. Just follow the steps in the shopping cart and upload your file when you see this button:
If you want to submit your files at a later time, you can log in to 'My Account'. You can upload the files to your order at any time by clicking the "Upload and proof" button.
See also: How can I upload a new artwork file?
To avoid mistakes we ask you explicitly not to mail your files to us. If you want to give us instructions or ask questions about your file, you can upload a second file in which you mention this. Call this file 'INSTRUCTIONS'. If necessary, we will contact you as soon as possible.
Good to know: there is a deadline for uploading and approving your file. Before the deadline, your file must be received by us, you must have approved the proof and the order must have been paid. If this does not happen before the deadline, your order will be postponed for at least 1 working day.
You will find this deadline on the website when choosing your delivery date and in the confirmation email.
Note: You can only upload one design to each item in your cart.