VITEEE counselling is offline mode. Allottment is done on the basis of merit scored in VITEEE. To participate in counselling process, you have to download the provisional letter from the student portal and take it along to the counselling. You should carry all the relevant documents. You need to first register at the assigned counselling centre according to the schedule. Counselling centre depends on your rank in VITEEE. Once you successfully register, you should get your documents verified. After document verification, authorities will allot a seat based on the rank, availability of seats and your choice. You are also required to upload all the documents in the format specified by the admission authorities. You have to pay the amount to confirm your seat. Check this: https://engineering.careers360.com/articles/viteee-counselling