Hi Madeleine and welcome to the forum. On the assumption that you are also new to the site this link should help you find your way around.
Welcome to Benefits and Work You should also read
this topic please
You should contact DWP and ask them for a copy of the assessment report as the Assessment Provider does not keep a copy once your paperwork has been returned to DWP. Some of our members have been able to obtain the report before the decision, other have had to wait until afterwards.
If you have further questions on this subject (I assume PIP as you refer to ATOS?), please reply to this message and we will do our best to help. You will find it easily in future if you bookmark/favourite it on your web browser now. Thank you in advance for your help in keeping all posts in one place