The T5008 is a Statement of Security Transactions that reports the dispositions, redemptions or cancellations of a security. The cost or book value is found in Box 20 on the T5008. Per CRA, the amount in Box 20 may or may not reflect your adjusted cost base (ACB) for the purpose of determining the gain or loss from the disposition of the security. You need to make the adjustments, as required, to the amount indicated in Box 20 at the time of determining and reporting the gain or loss from the disposition. For more information on the T5008, refer to the CRA website. Please note: The book cost reported on the T5008 is not guaranteed.