The IRS is reminding taxpayers that all forms in the 1042 series should now be mailed to Ogden Service Center, P.O. Box 409101, Ogden, UT 84409. These forms had been mailed to Philadelphia, PA in past years. The forms affected include: Form 1042, Annual Withholding Tax Return for U.S. Source Income of Foreign Persons, Form 1042-S, Foreign Person's U.S. Source Income Subject to Withholding, and Form 1042-T, Annual Summary and Transmittal of Forms 1042-S.