*This feature is not available in all plans. To see the different plans or make changes to your plan, go to the Plan & Billing tab in your account.
Yes!
Go to Commerce > Orders and click on the specific order.
You will see a "Replace" link beneath each image in the order (lab order items only); click it to replace the file prior to submitting the order to the lab!
Read about the entireĀ lab approval process here.