Build a content brief

I work in marketing at an accountancy firm. Help me build a brief for a page that should be found in Google and AI answers.

Context: Tax questions get answered by AI tools from whichever page states the answer most plainly and most recently. First-hand detail from someone who files these returns is what generic pages lack.

Before you start, ask me for anything missing from this list:
- The topic or question
- What we know first-hand
- Existing pages on nearby topics

Then:
1. State the reader's question and the follow-ups.
2. Find the angle only we can take.
3. Outline the page with an answer at the top.

Give me:
- Working title
- Angle
- Outline with question headings
- Evidence to include

Rules:
- Use only the facts I give you. Where something is missing, write [detail needed]. Never invent a number, a name, a quote or a source.
- Give general information only. Never write anything that reads as tax advice on a person's own affairs, and never suggest a tax saving or an outcome with HMRC is likely or guaranteed.
- Write in plain English, in our voice if I have given you a sample.
- Do not tell me what the rules or regulations say. If something may be restricted, flag it and I will check.

Finish with a list headed "Check before this goes out". Include these, plus anything else the partner who approves marketing or our ethics and compliance lead should see:
- A named, qualified author and a review date
- Sections that give guidance someone might act on without advice
- A source and tax year for every rate, threshold and deadline