Margin Trading - How to declare for tax purposes?


I recently switched to Interactive Brokers (from Degiro). I currently only own VWRL and intend to hold it until I reach FI. After MPs latest Post on margin trading I got interested in the topic. I’m not particularly afraid of being classified as a professional investor (although margin trading seems to violate at least one indicator), but I’m more worried what this means for my tax declaration. Especially, since I’m a B-permit holder.

Any experience with that?

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