I purchased a house in India two years back, I have been paying mortgage for it and when I purchased the house I also paid tax in India.

My questions:
1. Can I claim tax credit for the interest I pay to the Indian bank for the mortgage? I can show transactions that I have been transferring funds to the account.
2. If yes, can I also claim previous years tax credits. I might have possibly missed the chance

Sorry, If I am so naive about these tax implications.