Accounting entries-as-9

One of my Friend is providing services of animation courses to the students and charges 1200,000 annual fees and service tax is 10.3%.
The bill is to raised at the time of registration and the fess is receivable on installment basis.(100,000/- per month).
So my query is how the accounting entries will be passed and what is the service tax liability. I mean how it is to be paid on monthly basis or at the time of registration of course (AS-9)

Please reply its very urgent