ITC reversal

asif shaikh (189 Points)

04 February 2021  
my client in real estate business.he started 100 flats construction on 1-9-17.out of 100 flat 80 flat are book by coustomers and 20 flats are remain un sold till. to day.B.U.permission receive today.Now question is that client taken full ITC up to date in which how many ITC should reverse and in which formula,because after b.u.unsold flats become tax free.