Franked Investment Income (FII) is the name for UK dividends that a limited company receives from another company.
To record FII on a CT600:
CT600 Core > Trade and Professional income > Tax adjusted profit/(loss) worksheet – disallowable expenditure > proceed with steps 1-4 (listed below)
CT600 Core > Computations> Tax adjusted profit/loss-disallowable expenditure > proceed with steps 1-4
NOTE: TaxCalc won't include FII when calculating corporation tax because this would tax the dividend twice. This is because the company issuing the FII has already paid corporation tax on it.