Attorney Fee Dispute — CPA made error on tax return

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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.

CPA made error on tax return. I've been dealing with this for about 12 weeks now and the situation isn't improving.

I have already done some research online but got conflicting advice.

Am I overthinking this or is this a real legal issue worth pursuing?