Do I need to complete a self assessment if I have assets overseas?

I have been chatting to different accountants and getting different advice each time. I am a UK resident (have been for the past 5.5 years) and have a full-time job here (PAYE). Recently, my parents back in Brazil have decided to make me a partner in their company. They have donated an amount to me so I could buy shares of that company. Do I need to complete a tax return in this case? I’m not receiving any dividends but I’m a shareholder and my parents have donated money for me to buy the shares (all happened in Brazil, nothing happened in the UK).

Hi,
The cash gift it self is not taxable but if you now have foreign income you will need to complete a tax return.
Thank you.