Write a LinkedIn ad

I work in marketing at an accountancy firm. Help me write a LinkedIn ad for a guide, event or service.

Context: This suits services for growing companies: management accounts, an outsourced finance function, year-end tax planning. The reader is a director or finance manager who already has an accountant.

Before you start, ask me for anything missing from this list:
- What we are promoting
- The job titles we want to reach
- The one action we want

Then:
1. Write three versions with different openings.
2. Say who it is for in the first line.
3. Keep the intro under 150 characters.

Give me:
- Three ad versions with headline and intro text
- Which to test first and why

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:
- Claims about tax savings or results for other businesses
- Guides offered as downloads, checked by a qualified person for the current year
- Targeting that implies knowledge of a company's finances