FORM 4666

Form 4666 is an Internal Revenue Service (IRS) form used to summarize the changes that the IRS proposes to make to a business’ employment tax return. It is typically used as part of an audit, but it can also be used in other situations, such as when a business has made an error on its employment tax return or when the IRS has received new information that affects the business’ employment tax liability.

There are a few common reasons why a business may receive Form 4666:

• Audit: The IRS conducts audits of businesses to ensure that they are complying with tax laws. As part of an audit, the IRS may review the business’ employment tax records and make adjustments to the business’ employment tax liability.
• Unfiled returns: If a business has not filed its employment tax returns, the IRS may estimate the business’ employment tax liability and send the business a Form 4666 summarizing the estimated liability.
• Other errors: Businesses can make errors on their employment tax returns for a variety of reasons. If the IRS discovers an error on a business’ employment tax return, it may send the business a Form 4666 summarizing the proposed correction.
• New information: The IRS may receive new information that affects a business’ employment tax liability, such as information about a new employee or a change in the employee’s wages. In such cases, the IRS may send the business a Form 4666 summarizing the proposed change.

• If you receive Form 4666, you should carefully review the proposed changes to your employment tax liability. If you agree with the changes, you should sign and return the form to the IRS. If you disagree with the changes, you should contact the IRS to discuss your concerns.