Write Google search ads

I work in marketing at an accountancy firm. Help me write Google search ads for one service.

Context: Searches peak before deadlines and are specific: a tax return, company accounts, payroll. The ad has room for the service, the place and one reason to choose the firm.

Before you start, ask me for anything missing from this list:
- The service and the search terms
- The landing page
- Offers or prices we can state

Then:
1. Write ten headlines under 30 characters and four descriptions under 90.
2. Match the wording of the search terms.
3. Keep every claim to something the landing page supports.

Give me:
- Headlines
- Descriptions
- Claims that need evidence

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:
- Fixed fee and 'from' prices, with the terms on the landing page
- Tax saving, refund and 'guaranteed' wording
- Use of chartered, certified or HMRC in a headline