When clients pull you apart: Navigating spouse and partner disputes

Tax professionals are trained to focus on facts and returns, but real-life client relationships can get messy. One of the most common ethical traps is being asked to serve two clients who are no longer aligned, like spouses going through a separation or business partners unraveling a deal. When loyalty feels divided, your duty is not to mediate; it's to protect confidentiality, remain objective, and know when to walk away.

Start by identifying who your client is

It sounds simple, but many tax pros don't take the time to document this. Suppose you work with a married couple or business partners. In that case, you need to clarify (preferably in writing) that each person is your client individually, not just "the Smiths" or "Greenline Ventures, LLC."

Use engagement letters that spell out:

• Each client's role and decision-making authority
• How information will be shared
• What happens if the relationship dissolves

This protects you from being pulled into disputes where one party expects loyalty that conflicts with your duty of objectivity.

Understand how conflicts evolve

A conflict of interest isn't always apparent up front. Often, you work with a couple or a partnership for years without issue. But if their relationship deteriorates, things change quickly.

Common red flags:

• One spouse requests a copy of the return without telling the other.
• A partner asks you to amend prior returns to reallocate income.
• Either party wants you to "just file separately this year" without joint consent.

In these moments, your objectivity is compromised even if there's no fraud or aggression. Under Circular 230 §10.29, that's a problem.

Circular 230 rules are clear

Section 10.29 says you cannot represent a client if the representation involves a conflict of interest, unless:

• You reasonably believe you can provide competent and diligent representation to each affected client.
• Representation is not prohibited by law.
• Each affected client gives informed consent in writing.

If you cannot meet all three of those, you must withdraw. No exceptions.

Real-world example: Who stays with the client?

You've prepared joint returns for a married couple for six years. This season, one spouse calls and says they've separated. She wants to file separately from her spouse and doesn't want you sharing any information with them.

You now face:

• A potential conflict of interest
• A possible confidentiality violation if you continue talking to both people
• A decision about who you continue to represent, or whether you should walk away entirely

The best practice is to disengage from both parties, unless you can get written consent from each to proceed with a modified arrangement. Otherwise, withdraw gracefully and suggest they each retain separate preparers. 

Use a formal disengagement letter that includes:

• The reason for your withdrawal (e.g., conflict of interest)
• What you will and will not do going forward (e.g., no amended returns, no discussions)
• A recommendation that they seek separate tax advisors
• A precise cutoff date for communications

This protects you from future misunderstandings, regulatory complaints or exposure to malpractice.

Keep these policies in place year-round

You don't have to wait for conflict to arise. You can set up systems that reduce risk, such as:

• Using separate portals or accounts for multiparty clients
• Including a conflict-of-interest clause in every engagement letter
• Reviewing representation status during tax planning meetings

Your role is to remain an impartial advisor. If that's no longer possible, ethics requires you to step back.

Help clients feel heard, not judged

Even if you're stepping away from a case, your tone matters. Clients may feel abandoned or angry, but you can still exit professionally and calmly.

Try language like:

"Now that your interests no longer align, I believe it would be in everyone's best interest for you to have separate representation. I'll provide copies of prior returns and a summary of where we left off."

This avoids blame and reinforces your commitment to professional standards.

By setting clear policies, documenting your steps and communicating with care, you protect both your clients and your practice. Ethics aren’t just rules; they’re the foundation of lasting trust.