Was I adopted legally ? At birth my name was michael eugene t.,, but it was then changed.

I am removing your full names from your post due to safety issues. It is very unwise to post your full name on an unsecure webpage.

Michael, may I ask how old you are and if you have asked your parents?

Have you obtained a copy of your birth certificate?

You say your name was changed ? How, and when.
What does the birth certificate say ? What does your parents say ?