Underdog in avi is right on point,
I can't never come off trt since I have shut down own production of naty test, however the times I have missed out on trt doses within 2 weeks I notice loss in libido low energy and so when I do blood work after a miss on trt for the time said my test panel comes back very low hardly any test in my blood, but yeah if your taking some lab test to clear out something you don't want your employer to see just between you and your physician risk involved may apply since it may take a long time before you're clear.
theres not a specific time to flush out everybody has a diffrent body some can clear out sooner than others.