Advance booking amount

For better accounting always maintain customer wise ledger. Whatever the money received from customer should be credited to indiviual customers a/c. And whenver the revenue recognition criteria got matched as per the Guidance Note on real estate accouting, the balance from customer a/c to be transferred to Revenue a/c.

Thank you so much sir.

sir please clear one more  thing, is there any particular head or ledger which is used in real estate firm  for income.

You can use ledger name like, "sale of flats/plots"

Or if you are recognising revenue by percentage completion then you can you "sales based on percentage competion"