I have the same type of question, I'm registered for income tax and do form 11 each year via ROS, but I am a fulltime PAYE employee. For the the eWorking claim, Revenue says to submit via the myAccount website, but when I follow instructions, the myAccount website it says I cannot because I'm registered for income tax.
Does this mean I've to wait until the end of the year to get this money back, where as someone who's never registered for ROS or filled in a form 11 can get it back from this month?