When you sell or trade a token and your balance of that token is insufficient to cover the full amount sold or traded, the software automatically assigns a value of zero to the missing portion, as required by current regulations.
This can happen, for instance, if there are missing incoming transactions for that token on certain connections or platforms, leading to a negative balance. As a result, if this transaction generates a capital gain or loss, the displayed value might appear higher than the actual value.
You can choose to leave the calculation as it is: this choice is fiscally correct as it follows a conservative approach. Alternatively, you can try to identify and manually integrate the missing transactions to correct the balance and achieve a more accurate calculation of capital gains.
An icon like the one shown in the image below will be displayed on the transaction row, next to the amount of capital gain generated.
Hovering over the “!” symbol with the mouse will display a message informing the user about the calculation performed to determine the indicated capital gain and how to adjust it for corrections.
The message will appear as shown in the image below.
The notification can also be viewed by accessing the transaction details within the box indicating the capital gain, as shown in the image below.
The notification is also present in the capital gain/loss field within the transaction details, as shown below.