Yes circular they only have to mention anything they are/will/have earned job-wise in the previous 7 days. So any DC hoping to get a job at uni, apply for HC1 first, then get a job! And even if they made squillions over the summer
, they do not need to declare this income.
We got our form from the dentist - they always seem the most helpful and knowledgeable. I would suggest getting a couple of extra forms and make a master copy to refer to every year - makes things a lot easier! If anyone has any questions, do ask. I'm not by any means an expert but did get to grips with it eventually.