Source: http://www.hrresource.com/articles/view.php?article_id=107
Timestamp: 2019-04-21 10:09:44+00:00

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In the ordinary course of commencing employment a new employee will execute a W-4, Withholding Exemption Certificate, to inform his or her employer of the correct filing status and number of exemptions and personal allowances to use when calculating income tax withholding. This process occurs upon hire, and sometimes changes during the year. But what happens when employees make "unusual" requests of their employer relating to withholding? This Insight provides a brief guide for employers to help determine their payroll tax obligations.
Employees should execute a valid W-4 upon hire (and may, in some cases, also execute a separate state version of the W-4). The W-4 informs the employer of the employee's filing status (e.g., single, married, head of household), as well as the number of exemptions and personal allowances being claimed. Thus, the W-4 provides the employer with the necessary information to determine the proper amount of federal income tax to withhold based on the appropriate withholding table.
An employer, however, may elect to make the W-4 effective at an earlier date.
For example, if on March 25 an employee executes a W-4 changing his prior valid W-4, it would not be effective until the first pay period beginning after June 1, although the employer could make it effective sooner.
Employees are required to submit a new W-4 within 10 days of any change that causes the number of exemptions stated on a W-4 to be more than the number of exemptions to which the employee is entitled (e.g., the employee gets divorced, which would reduce his or her exemptions by one).
An employer should not knowingly use an invalid Form W-4 to calculate withholding.
The employer should tell the employee when a W-4 is invalid and ask for another one.
If the employer receives a letter from the IRS, called a "lock-in" letter, the employer must disregard the W-4 and any W-4s subsequently executed by the employee and follow the IRS' withholding instructions, unless the new W-4 would withhold more than the IRS requires.
Employee executes a W-4 claiming he or she is exempt from taxes just before a large bonus or commission is due. Claiming exempt from taxes is highly unusual for most employees because they must be able to attest that they had no tax liability in the prior year and expect to have none in the current year. This is unlikely for most employees that earn regular wages or salaries above more than very minimal amounts.
Employee executes a new W-4 claiming a very large number of personal allowances just prior to a large year-end bonus or commission. In this situation the W-4 is probably invalid, particularly if the employee has otherwise had regular withholdings during the rest of the year. However, it may be difficult for an employer to know the actual basis for the increase in personal allowances unless the employee informs his or her employer.
Employee claims that bonuses or other forms of supplemental wages are not subject to withholding. Employees may believe that only regular wages are subject to withholding. To the contrary, supplemental wages may be subject to a flat withholding rate of 25 percent (or 35 percent for amounts over $1 million).
Determine whether the employee has made any oral or written statement indicating that the W-4 is invalid, other than the W-4 itself. The IRS has informally indicated that it believes a W-4 is invalid on its face when there has been regular withholdings throughout the year and there is a sudden significant increase in the number of personal allowances.
Check the employee's personnel file to make sure there is no "lock-in" letter from the IRS regarding the proper method of withholding for the employee.
Confirm with the employee that the W-4 properly reflects his or her intent with respect to withholding (i.e., that the employee did not simply make an error in filling out the W-4).
Contact counsel with any questions or concerns.
There is no express requirement that employers confirm that the information on a W-4 that appears valid on its face is not incorrect or fraudulent. IRS guidance on the issue is somewhat contradictory, because the IRS has stated that employers need not verify W-4s, but at the same time expressed the opinion that an employer should know that a W-4 is invalid on its face when it represents a sudden dramatic departure from the employee's prior withholding. Employers are thus put in the somewhat awkward position of having to make judgment calls about the validity of W-4s.
Therefore, until the IRS provides further clarification and guidance on this issue, employers should be wary of unusual W-4 requests. Littler's Employment Taxes Practice Group can assist employers with any questions about questionable W-4s or unusual employee requests.
1 Treas. Reg. § 31.3402(f)(2)-1(e).
2 Id. , at § 31.3402(f)(5)-1(b).
3 See IRS Publication 919, How Do I Adjust My Tax Withholding?
4 Treas. Reg. § 31.3402(f)(3)-1(b).
5 Id., at §§ 31.3402(f)(2)-1(e), 31.3402(f)(5)-1(b).
6 Id., at § 31.3402(n)-1; see also Instructions to Form W-4.
7 Prop. Treas. Reg. § 31.3402(f)(4)-2(c).
8 There are a group of taxpayers commonly referred to as "tax protestors" who generally assert that they are not required to pay taxes. We are not addressing tax protestors here, but will do so in a later Insight.
9 "Statutory employees" are workers that qualify as independent contractors under the common law for income tax withholding purposes, but nonetheless are treated as employees for FICA and/or FUTA purposes. Statutory employees includes certain commissioned sales persons and certain persons that work at home. See IRC § 3121(d).
10 See Rev. Rul. 90-93, 1990-2 C.B. 33.
11 IRC § 7205; see United States v. Echols, 677 F.2d 498 (5th Cir. 1982); United States v. Smith, 484 F.2d 8 (10th Cir. 1973) (taxpayer who claimed ten exemptions on withholding statement, but knew that he was only entitled to claim two, willfully supplied false information).

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