I am travelling from DRC to Mumbai soon, while I was gifted 3 bottles of alcohol by friends here. Understanding that custom might require it's receipt, I have collected it from them.

Mumbai Airport allows 2L of duty free alcohol while this rule is quite confusing. The alcohol I have with me is not duty-free as it is paid with taxes. Will I be able to shop in duty free sections despite having around 2.75L in check in baggage?

How much duty will I have to pay if I want to grab a double black jack daniels, it is one of my favourite and gifts has different one so I'd be okay to buy one of DB with paid duty if reasonable.

Thanks :)