For first round counselling, the AIQ choice filing has already begun from 20th of June and is going to end at 5 pm on 25th of June. The state choice filling form depends on the state you stay in.. In many states like Telangana state merit ranks are released and in some states like Maharashtra they are yet to release the SMR. So once the SMR are released, withing 2-3 days of working, an official announcement will commence after which the choice filling will start. 

For any more queries, feel free to ask. 

Thank you.