Is there any way to switch your account from a student account from a normal one? I recently became 18 and want to be able to send money, invoices, etc.
When you first log on, do you see a link that lets you upgrade? Or in your profile? If not, you will need to call PayPal customer service. Click "Contact" at bottom of page.
I doubt you can upgrade your student account because it's linked to the parent account, more likely paypal will need to close the student and you need to setup a personal account.
