DIVISION OF REVENUE AND TAXATION
COMMONWEALTH OF THE NORTHERN MARIANA ISLANDS
Post Office Box 5234 CHRB, Saipan, MP 96950
2010 Supplemental Instructions for Forms W-2CM and OS-3710
These instructions are intended for employers to use in conjunction with the Internal Revenue Service instructions for
2010 Forms W‐2 and W‐3.
General Information – Form W‐2CM is a five (5) part form which provides the employee with Wage and related
information necessary for the preparation of an annual tax return for the Wages and Salary Tax, NMI Territorial Income
Tax (NMTIT), or the Federal Income Tax, if required. Copies of this form are required to be filed with the CNMI Division
of Revenue and Taxation and the U.S. Social Security Administration (SSA).
Copy 1 shall be attached to Form OS‐3710, Annual Reconciliation of Taxes Withheld, and filed with the
CNMI Division of Revenue and Taxation no later than February 28, 2011.
Copy A is for the SSA and shall be attached to Form W‐3SS which shall be filed with SSA no later than
February 28, 2011.
Copies 2 and B shall be provided to the employee no later than January 31, 2011.
Important – All required information in Form W‐2CM constitutes the completeness and accuracy of the form being
submitted, including the correct social security number of the employee, Citizenship code (item C), NAICS (item D), and
SOC (item E). Penalties will be enforced for incomplete and/or incorrect information and for failure to file a Form W‐
2CM by the due date when you cannot show reasonable cause. The penalty applies if you:
Fail to file in a timely manner,
Fail to include all information required to be shown on Form W‐2CM,
Include incorrect information on Form W‐2CM
Fail to file electronically when required,
Report an incorrect TIN (SSN),
Fail to report a TIN (SSN).
The penalty is:
$50 per Form W‐2CM if you file after the due date.
$15 per Form W‐2CM if you file in a timely manner and have corrected all errors within 30 days after the
due date; maximum penalty is $75,000 per year ($25,000 for small businesses).
$30 per Form W‐2CM if you file in a timely manner and have corrected all errors by August 1; maximum
penalty is $150,000 ($50,000 for small businesses).
$50 per Form W‐2CM if you file in a timely manner, if errors were not corrected by August 1; maximum
penalty is $250,000 ($100,000 for small businesses).