Previous NFHS surveys at Wikipedia stretching to 1981.
India overall is now at TFR = 2.1 children per woman. Kerala, long one of the lowest TFR states (as well as one of the most socially developed), is now middling.
But most interestingly, a number of states are approaching near East Asian lows. These are mainly the islands states (Sikkim at 1.1), and – most curiously – majority Muslim Jammu and Kashmir (1.4).
Bihar, the worst Indian state, has the highest TFR.
I expect most of India to hit current East Asian (Taiwan/S. Korea/etc) “lowest low” fertility by the 2030s.