The semester you intend to graduate, you will need to apply for graduation via Howdy. If you are taking a course outside of A&M your last semester, you will need to submit proof of co-enrollment to the Degree Audit office by the Q-drop deadline per Student Rule 14.2.
You can find additional information about graduation and deadlines at http://graduation.tamu.edu or at http://registrar.tamu.edu.
Once you apply for graduation be sure to notify your advisor, so we can make sure you have cleared.(Edit)