As long as you are eligible, you may apply for a loan before your school's enrollment period if you plan to use this to pay your current tuition balance.
If you are applying for a loan to pay your current tuition balance, you may submit your statement of account as one of the requirements. You may get this document by reaching out to your school's accounting or cashier office.
If you are planning to apply for a loan to pay your tuition for the next semester, ensure that you are eligible to re-apply by reading this article: Am I eligible for Multiple Installment Plans (MIP)?. If you are eligible, you may submit your application as soon as you receive your tuition assessment form. You may read the list for the acceptable school assessment form per school or university in this article: Tuition Docs | BukasPH. In the meantime, please ensure that all information on your application are correct and updated.