You need to pay attention to it properly! Make sure you understand what exactly they need and also when uploading in the Additional documents section make sure you pick the right option that represents what you are uploading.
If you’re March 2023 DQ if I’m not mistaken IL’s for that period should have been sent out between Nov-Jan so I’d advise you go through your emails for that timeframe and also check spam also very well maybe there’s something there that could help.