A copy of your receipt is emailed automatically after your purchase. Would come from paypal (regardless if you have an account, they process the transaction.) So you can search your email history (please check spam as a ton of automated emails end up there) from paypal and you will most likely find your receipt there.
Tax question?
If you would like to delve deeper into taxes. We often get asked around tax filing time for a 1098 T form. We don't provide a 1098 T as we aren't an eligible post-secondary educational institution as we do not provide financial aid. Schools that qualify as an eligible post-secondary educational institution are run by the U.S. Department of Education, which we are not. We don't offer financial aid and thus aren't involved in those programs. Your tax specialist might be able to advise how the $550 expense might be documented but as far as us providing forms, we have never done so for the above mentioned reasons. A list of schools that do qualify can be found here https://ifap.ed.gov/ifap/fedSchoolCodeList.jsp