Hi, I submitted my first ever PIP application and have now been sent an assessment date. However, when completing the form, I did not complete three categories as I hadn't understood what was being asked for. Having had a few weeks to think about it, I now realise how my disabilities fit into those categories. Can I bring this up at the assessment ir, better still, add info to the form via a phone call or letter? My assessment is in 2 weeks time?