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I closed my CPF account in March 2024 and am calculating the value of the lump sum to report on my 2023-24 tax return. On each of my three prior years tax returns (since moving back to UK from Singapore), I have declared the interest earned on my CPF account as income, in the form of foreign savings interest: this interest was added to the balance on my CPF account each 31st December. Should I deduct this interest from the calculation of my lump sum, so that I don't get taxed on it twice?