Hi Hiu Young,
The result of the calculation when a chargeable event arises may not be a positive amount.
There’s no relief for a loss and you should not make any entries on your tax return.
However, if the result of a full surrender, death or maturity calculation is negative and you made gains on the policy in
earlier years, the section that follows about ‘deficiency relief’ may be relevant.
A loss on one policy cannot be set off against a gain on another policy.
Further guidance is at -
HS321 Gains on foreign life insurance policies (2023)
Thank you.