First of all you need to register on the website using your ID email, birth date, gender, etc and other personal details. Then the required documents need to be uploaded to the website of TANCET where you have filled your application earlier. After this you have to pay the required fee which is 500 for Unreserved and 200 for sc/ST,etc. You will get Mtech link on the official website. Here is a link for more info regarding counselling of TANCET 2019: https://engineering.careers360.com/articles/tancet