In the end we agreed for her to complete the tax form and when we received a copy and agreed it, the funds were paid direct from my parents bank account here, using the POA. Parents dont have internet banking.
I insisted on seeing the tax form before it was paid, and eventually I got it, with the wrong date of sale , different amounts to the excel sheet she had provided for the amount payable, (firstly with 20% CGT and then after they argued that CGT was definitely 20% , they eventually agreed that it was 19%)
One strange part was that they completed and signed the tax form a a “voluntario” and not “legal” which makes me think they are not qualified. I asked if it was correct and she replied it was.