As of now, the NCAP test has not been done on Tata Tiago so it would be too early to give any verdict as it's not tested yet. So, we would request you to wait for its test.
The waiting period of a car depends on the stock book of the dealer, we would suggest you walk into the nearest dealership as they will be better people to assist you. You can click on the following link to see the details of the nearest dealership and selecting your city accordingly - Dealers.