Hi anant patil !
If your institution does not yet have Turnitin, you'll need to contact our Sales team so they can get your school all set up: https://www.turnitin.com/contact
If your institution already has an account and you just need help setting up your profile, you can visit our Help site (https://help.turnitin.com/Home.htm) and search for the answers you're looking for-- we have many helpful guides in setting up accounts and troubleshooting.
Any other questions, feel free to email our Customer Support team directly: firstname.lastname@example.org
Hope this helps!