Use Microsoft Word Copilot to Draft Tax Memos and Client Letters

What This Does

Word Copilot lets you draft and reformat professional tax documents (research memos, client letters, planning summaries, engagement letters) directly inside Word by describing what you need. Turns a blank page into a structured draft in seconds.

Before You Start

• Your organization has Microsoft 365 Copilot licensed (paid add-on)
• Microsoft Word is open (desktop app or Word on the web)
• You have your notes or source material ready

Steps

1. Open a new Word document or an existing draft

If you're writing from scratch, open a blank document. If you're reformatting an existing document, open that file.

2. Find the Copilot prompt

Click into the document body. In an empty document, select the Draft with Copilot icon that appears on the canvas. Alternatively, click the Copilot icon in the lower-right corner of the document window to open the Copilot pane. Microsoft moved Copilot off the Home ribbon in 2026, so the corner button is now the main entry point; press F6 to jump to it from the keyboard (Alt + C on Windows and Cmd + Ctrl + I on Mac are rolling out too), or right-click the corner button and choose Move to ribbon if you prefer the old placement.

3. Describe what you need

In the Copilot prompt, describe your document type and requirements. Be specific about structure and audience.

Examples:

• "Draft a tax research memo using the IRAC format: Issue, Applicable Law, Analysis, Conclusion. Topic: whether rental income qualifies as QBI for our client who manages 8 properties directly."
• "Write a client letter explaining that we recommend making a Q4 estimated tax payment of $12,000 by January 15 to avoid an underpayment penalty. Tone: professional but accessible to a non-tax client."
• "Write an engagement letter for an individual client. Services: federal and two-state individual tax returns. Fee: $1,200-$1,500. Include sections for scope, client responsibilities, fees, and a signature block."

What you should see: A complete draft appears in the document, typically within 10-15 seconds.

4. Add your specific facts

The draft will have the right structure and professional language, but it won't know your client-specific facts: numbers, dates, specific transactions. Click inside the document and fill in the specifics. Look for placeholders like [CLIENT NAME] or [TAX YEAR].

5. Use Rewrite to adjust specific paragraphs

Select any paragraph that isn't quite right and use the Rewrite option Copilot offers in context, or describe the change in the Copilot pane ("make this section more formal," "make the analysis more detailed"). Use this to tighten executive summaries or expand analysis sections.

Troubleshooting: If the draft is too generic, regenerate with more detail in your prompt. Adding "for a C-corp client in the manufacturing sector" produces much more relevant content than a generic request.

Real Example

Scenario: You've completed research on whether your client's software development activities qualify for the R&D tax credit. You have your notes but need a clean memo for the file.

What you type: "Draft a tax research memo on whether our client's software development activities qualify for the §41 R&D tax credit. Use IRAC format. Key facts: client develops proprietary inventory management software for internal use, 4 full-time developers, activities meet the 4-part test per IRS guidance. Include analysis of the shrinking-back rule and computational vs. experimental activities. Conclude: qualified activities exist, recommend filing the credit."

What you get: A 600-900 word memo with all four IRAC sections, structured analysis of the key legal tests, and a clear conclusion. You fill in specific dollar amounts, cite the actual code sections you've verified, and adjust any conclusions that don't match your professional judgment.

Tips

• For client letters, always add a human touch after drafting: a personalized sentence or two goes a long way
• Ask Copilot to convert bullet points into full prose ("turn these bullets into paragraphs"), useful when your notes are in list form
• Keep a library of your best Word Copilot prompts: the ones that produced great memos the first time will produce great memos again

Tool interfaces change, if a button has moved, look for similar AI/magic/smart options in the same menu area.