I am a new FT user, and I was just wondering the same - won’t FT automatically provide me with an end-of-the-year tax report?
Ultimately, I think it won’t be so relevant to me because of what SebReitz said above: “you only need to report it if it’s above your personal allowance, which is probably not the case for most people using freetrade (yet).”
The personal allowance on capital gains is £12300 currently (Capital Gains Tax: what you pay it on, rates and allowances: Capital Gains Tax allowances - GOV.UK), and on dividends £2000 (Tax on dividends: How dividends are taxed - GOV.UK)