Connecticut Administrative Code
Title 12 - Taxation
740(a) - INCOME TAX
Part IX - Withholding
Section 12-705(a)-5 - Addition to or reduction from withholding

(a) In addition to the tax required to be deducted and withheld under this Part, the employee may request that the employer withhold an additional amount from the employee's wages. An employee with other income in addition to compensation subject to withholding may have additional amounts deducted and withheld in order to avoid the requirement of paying estimated taxes. The additional amount deducted and withheld shall be considered as tax required to be deducted and withheld under the Income Tax Act.

(b) An employee may also request that the employer withhold an amount less than that which would otherwise be withheld from such employee in his or her exemption category. Such request may be made when the employee expects to sustain losses which would reduce federal adjusted gross income and thereby reduce such employee's Connecticut adjusted gross income or expects to make modifications under § 12-701(a)(20)-3 in computing Connecticut adjusted gross income. The employee may not use in determining the proper Connecticut income tax to be withheld the tax shown on the Connecticut income tax return of such employee for the preceding taxable year or 90% of the tax expected to be shown on the Connecticut income tax return for the taxable year.