If you go onto your home page on studenthome you should see a link for the TMA system (I think its on the upper left hand side) Click on that and it takes you to the TMA page where you get an option to collect your TMA. Then just open or save the file. You should get and email to your Ou inbox to say when you have a TMA ready to be collected though - check both boxes as sometimes things get sent to the wrong one.