I was wondering if anyone has had experience with UBTI from Breitburn Energy Preferred Stocks?

UBTI, I though, was suppose to be for owners of a LP or MLP.
Preferred Stock is no suppose to be an owner since they have no voting rights and are effectively like a bond.

Also, I sold my shares last fall and bankruptcy was not finalized until April of 2018.
So discharge of debt was almost 6 Months after it was sold.

My tax account doesn’t know what to do. He directed me to a Tax Lawyer who doesn’t
return my calls.

Any thoughts and advice would be appreciated.

…Larry