Hi Maria! 

What do you see when you try to check for plagiarism? Is there an error message, or is the option missing entirely?

For questions like this, it’s best to reach out to your institution’s Turnitin administrator or contact Turnitin Support directly so they can investigate further. They’ll be able to check your account setup and make sure everything’s working as it should.

Hope this answer was helpful! - Kat, Turnitin Team