Hi

I started a bit of stocks trading in 2025. I did pay CGT tax based on summaries from Interactive Brokers statements (Profit realized minus Loss Realized minus 1270e multiply by 0.33). I'm to send CG1 form for 2025 as soon as it will be available on Revenue's web.

Do I have to attach any proofs of my calculations to that form? Or do they just request those in case of audit? Do you know if IBKR statements for 2025 for account in EUR is good enough in that case (unfortunately stocks I traded were in 4 different currencies but final report for gain/loss is in EUR).

Thanks for any advices!

Tomas