I know! But according to Chaengwattana Immigration female officer I had to do it 15 days before! She said the 15 days before and 7 days after is only when you attend in person. Online has to be done 15 days before. Total bullshit and shit service. I had to travel 2 hours there and back for a 5 minute report!
Were you told to do it earlier? In December I did my first 90 day report at Chaengwattana Immigration, I was handed a piece of paper that said do the next 90 day report on 7th March. I did exactly that and they rejected it saying it was submitted late!