If you are not on probation, then the gov has no right to ask you to test as a term of probation. The Q is are you off of probation. Probation typically begins when you are sentenced and lasts for the term ordered by the court. I am not clear about what papers you haven't turned in. If its proof of completion of your probation requirements, you definitely want to turn them in because if you don't it will look like you haven't completed your requirements. If you haven't completed your requirements, you can be violated which would then extend your probation term.