Crossing of turnover after composition limit

One of the Service Provider is under composition scheme and turnover is below 50 lacs but this current year very likely the Turnover may cross 50 lacs,

my concern and querry

1. What are the actions are to be taken after T O crosses.

2.The rate of Tax thereafter , and the legal procedure of information to be given on Portal

3. And whether ITC will be available after that Date .


please clear my Doubts/ Querries