The easiest way is to check your DARS report. If you scored high enough to earn credit, the course abbreviation and the hours earned will be recorded on your academic record, and the grade will be PS, meaning "pass." You do not need to do anything more.
If you did not score high enough to earn credit, you will not see anything in DARS. Most departments inform test-takers of their results via email or a secure website. If you have questions, you should contact the department that administered the test.
The department that administered the proficiency test is responsible for grading your test and submitting the Proficiency Examination Results form to the Registrar's Office and/or to your College office. Please be patient, as grading exams and updating all students' academic records with the results can take several weeks.