You should have the required cut-off marks for the college you can visit the website for getting more details on the cutoff because it changes year by year. The application form will be available on the college website and you can go and register that. A faculty will call you and you can attend the call and then you can proceed to the admission process.

I didn't apply for Anna University counseling as I decided on engineering as the last option so I visited the college campus for consortium-based admission they will ask for some capitation fees for available seats and we should book our wanted seats. Later they will let us know about the admissions process and they will guide us through the registration process and fee payment.