Missdontunderstandtax

I already tried thanks but still wasn’t sure because the warnings were from work in another couple try which I have already paid tax for and it was before I immigrated to UK- so I wasn’t sure. The pension I received was also money I received a few weeks before I came to UK

Hi, my family and I have arrived in the HK in August 2024. I had a job before the move in another country. I now have a job here in UK, have. Even working around 2-3 months. Do I have to fill in a self assessment form to declare the working income I received before I came to UK? I have already been taxed in my home country. Also, I received my pension early (before I entered UK), should I declare this money in a self assessment form also? If we do, I think we have just kissed the deadline, what shall we do? Very lost and don’t understand the HK tax system at all. Thanks