jeffmcpa2010
Level 11

When I have clients who have something "out of the blue" that is outside my scope of knowledge and experience, and also appears to be a complicated issue, I generally inform them that I don't have the capability to properly deal with their specific tax issues, and that they will need to find a new preparer who is competent in those issues.

Saves me a lot of sleep and worry.

Best wishes on figuring out the answer to your Clients problem.