What is a CAP (closing agreement program)?
There are two types of CAPs: "walk-in" and those initiated by the IRS. The walk-in procedure is voluntary and initiated by the company when it finds a problem. Under it, the IRS can impose taxes, including excise penalties, if it deems the violation serious enough. If the IRS finds the problem, the taxes and penalties are likely to be higher.
Link to this FAQ Topic: Governance, Fiduciaries & Compliance