The IRS uses Form 4666 to summarize the changes it proposes to make to a business employment tax return. (Form 941 or Form 940). Thus, this can be the result of an audit or for unfiled returns.
A more detailed report is usually contained in Form 4667 or Form 4668. So, the Form 4666 must read in conjunction with Form 4667 or 4668.
Respond to Form 4666
More information, forms & direction about IRS audits can be found in the Business Tax Prep Steps. If you agree the tax is owed, please follow the Collection Prep Steps.
