The trust fund is controlled by my stepmother and I suspect she withdrew funds on my behalf, but I did not receive the funds. I never received any notification related to the withdrawals, only notification from the IRS that the income I was reporting was being increased because of the disbursement of these funds.
I would advise talking to your stepmother about this distribution she apparently made and also consulting the attorney that drafted the trust documents. A CPA may also be able to help with this situation.
You should have received a form K-1 from the trust. I would consider talking to a local Enrolled Agent to deal with IRS. EA's along with CPAs and Attorneys can represent you in front of the IRS. If your stepmother did indeed do what you suspect, I would contact an attorney and talk about your options with regards to your stepmother..