Wrongly itc availed not utilised ( days for int. calculation)

Bhagyashri Dhavale (13 Points)

16 June 2019  
I know that , if I wrongly availed ITC I have to pay interest @ 24% p.a. on the availed amount. I have doubt regarding calculation of days I.e. int. from succeeding days of availed credit to payment of interest or filing of revised 3 b return??????