2017 CD-429B Underpayment of Estimated Tax by C-Corporations
Corporations use Form CD-429B to determine whether the corporation owes interest on the underpayment of estimated tax and if so, the amount of interest.
Greensboro Service Center Closure
The Greensboro Service Center is closed until further notice. We apologize for any inconvenience this may cause. Please call 1-877-252-3052 for assistance.