The "Margin/Shorting" column allows you to indicate whether a transaction was executed with margin or was a short sale trade (see definition of a short sale here).
Transactions should be indicated as margin/shorting wherever applicable as this may affect the calculation of your cryptocurrency gain or loss as well as your ending balances.
For help understanding, if your trade was a transaction done using margin or was a short sale.
NOTE: Lukka does not provide tax advice. The statements above are general in nature and do not address how the application of the tax rules can vary based on a taxpayer’s actual facts. Please consult a tax professional on how the tax rules apply to your specific facts.