hello aspirant,

there should be several reporting center. you should go to the center which is nearest to you.

and the documents needed for counselling is

 Score card

Degree/Provisional certificate and Marksheets of qualifying examination

Marksheets and certificates of class 10 and 12

Category certificates from competent authority (In case of student claiming reservation)

Residence certificates/Domicile certificate

Aadhaar Card

Income certificate issue after 01.01.2019

https://engineering.careers360.com/articles/ts-pgecet-counselling