Hello Aspirant, You first have to pay firstly the counselling registration fees and register in online mode.you have to book a slot for document verification at the time of registration.

To pay the fees,you will have to log in using your class XII exam hall ticket number, registration number of TS EAMCET and date of birth.

The fees payment will have to be done through online mode (Credit card/ Debit card/ Net banking). Without paying the processing fee, candidates will not be allowed to attend the document verification.

I am providing you a link by which you can clear your doubt. 

https://www.google.com/amp/s/engineering.careers360.com/articles/ts-eamcet-counselling/amp

I hope this will help you.