What would you do about deFi yield farming tax treatment?

I publish illustrative scenarios prepared by my practice. All participants and conversations are fictional. The fictional posts are not posts by real users, accounts of client experiences, or reports of actual results.
Illustrative scenario prepared by my practice.
For informational purposes only. This is not legal advice. Laws vary by jurisdiction. Consult a qualified attorney for advice specific to your situation.
Hypothetical question

I'm dealing with a situation and need some guidance.

DeFi yield farming tax treatment. I've been dealing with this for about 8 months now and the situation isn't improving.

I have already tried to resolve this directly but the other party is not cooperating.

Do I have a strong case? What should my next steps be?