How does “Group, loans, lending and actions” work on the Tax page?

Group reads Company Structure as at the year-end and checks it against the Companies House PSC register to say which companies form a 75% group — only a proven group may surrender and claim, and the split must balance; a company that can do neither (a foreign subsidiary) is named and left out of the split. Loans & assets is facts for the accountant: who lent to whom, the balance, rate, interest charged and paid, the 12-month and 9-month dates; the year's asset additions with a suggested capital-allowance class and the invoice behind each. Lending asks which companies could lend spare cash to the trading companies at a market rate without tax on the interest, from the same engine. Actions turns all of it into steps ranked by the tax each moves — a director's loan to repay before s455 bites, losses to use, relief to surrender, a repair to settle against an improvement — each with its deadline and a recorded decision, and each to be agreed with the accountant before acting. Where: Tax (/accounts/tax-planning).