Whether an education and training institution pays taxes depends on the unit where you apply for the bill. If you apply for financial bills from the Finance Bureau, and you are engaged in academic education, it is tax-free. Others need to pay 3% business tax.
Entry: When issuing a receipt:
Borrow: cash
Credit: accounts received in advance (or other payables)
When the receipt is changed into an invoice:
Loan: operating income
Debit: accounts received in advance