What is the Tax page for?

Each company's corporation tax position, for planning with the accountant: the profit and loss from Xero sorted into the heads tax law gives it, the losses brought forward by head, which companies form a proven 75% group and how relief could be split, the related-party loans and the year's asset additions, and an estimated charge. Every figure of tax on these screens sits under one line — Estimate for planning — not a tax return. Saral never calculates the return, never lays out CT600 boxes and never files; the accountant's software does that, from the heads and facts this page prepares. For Admin, Accounts and the CT600 reader. You enter: A GL's head where Saral's sort is wrong (Heads), guided by last year's computation; the few figures the books cannot give — capital allowances, a gain, close-investment-holding status (Computation); The losses ledger by head and year, confirmed or corrected against the computations read from the shelf (Losses); Company tax facts — type, close company, close investment-holding, associated companies — in their one place on Losses; A group relief split inside a proven 75% group (Group); a decision on each action — Agreed, Not doing, Ask the accountant, Done — with an owner and a date (Actions); a question for the accountant, the reply and its resolution, and each company's recorded filing status and the software that files it (Questions). Saral fills: The sort: every income and expense GL in each company's trial balance placed in its head — UK property business, loan-relationship credits and debits (interest on a related-party loan is never trading income), management expenses, trade, chargeable gains, charitable donations, disallowed — guided by last year's computation, with the lines to review flagged; The estimated position per company and for the group, with or without group relief, for the year or year to date; losses carried forward by head; how soon each head's loss can be used and whether it may lapse; Which companies form 75% groups as at the year-end from Company Structure, checked against the Companies House PSC register; the associated-companies count; the related-party loans register with its 9- and 12-month dates; the year's fixed-asset additions with a suggested capital-allowance class and their evidence; Actions ranked by priority and by the tax each step moves — repay a director's loan before s455, use losses brought forward, surrender inside a proven group, settle repair against improvement — with the deadline; planning prompts worked out from each company's facts, as questions and never conclusions. It produces: The heads and the facts the accountant enters in their software; the Position and Computation as Excel; the questions and prompts as Preview, PDF or Excel for the accountant's meeting; Nothing for HMRC. No return, no CT600 boxes, no submission — the recorded filing status on Questions is a note of what the accountant's software filed, not a filing. Where the settings live: Who may read this page is the CT600 and tax-computation reader key together with the Admin and Accounts roles; who may change a head, a loss or a relief split is Admin and Accounts, and the page shows an editor only when the API says so. Each company's year-ends are read from its Xero organisation's financial year end; entity kind and jurisdiction — what makes a company foreign — from Settings → Organisation → Companies & entities; the group from Accounts → Company Structure. Last year's computations are read from Accounts → Signed Accounts, where they are filed. The company tax facts are edited on the Losses tab, nowhere else.