Just an update on this post as it may help others given the nett cost of the above service is a fairly steep €150 incl. vat per year of the return. I was very put-off by the complexity of form 12 (I looked at a copy of one online). However, I got my ducks in a row by doing all the calculations manually first and used the PAYE online system form 12. It was fairly easy to do, and I got a balancing statement telling me how much I owed Revenue and they are simply deducting what I owe from my tax credits. Very happy I tackled this, I hadn't realised I wasn't fully tax compliant for my few quid dividends as I had paid the Dividend Withholding Tax already. I'm not good at leaving it to chance that Revenue would come knocking on me door so to speak. Someone who works for Revenue told me that I can ask Revenue to make a reduction in my current tax credits for this year and future years based on what I anticipate the dividend income will be, the income will be adjusted up or down when a new form 12 is submitted for the relevant year, the advantage being that you don't have to pay it all out in one fell swoop. Anyhow, hope this is helpful to someone.