There are different methods you can find your official school invoice/ bill notification:
Method 1 (Recommended) - Login your student account. Search for billing, student account, tuition and other information in the search bar on the school homepage. Alternatively, go to your institution's official website homepage to enter "MyXXX", and log in with your student account to view the payment balance and due information. For more details, please refer to your institution’s Help Center or FAQs.
Method 2 - Go to your registered email address at the school (e.g: .edu mailbox) to find related emails of bill notification issued by the institution
Method 3 - Go to your email address (e.g. 163.com, qq.com, gmail.com and etc.) you provided to your institution during application and to find the email of bill notification issued by the institution.
Method 4 - Other official documents with the amount for the past two months, such as
I-20/J-1for US institutions
CAS for UK institutions
Offer Letter for Australian institutions
Admission notice and payment documents or emails for Japan institutions
Method 5 - Contact your institutions directly