Federal income taxes withheld from a retirement plan distribution, which are listed in box 4 of Form 1099-R, are claimed as a credit on your return against the taxes you owe; they’re reported as taxes that you’ve already paid for the year.
An online and phone tax payment system available 24 hours a day. For enrollment information, call 1-800-555-4477, or go to www.eftps.gov.