My previous employer submitted my w-4 to adp for payroll. I entered my deductions correctly (as I always do) and requested that an additional amount be withheld as well. When it came time to file my taxes, I found out that I owed the irs $4, 000. When I contacted the employer, they said that it was adp's mistake. When I try and contact adp they refer me back to the employer. I filled everything out correctly, they submitted my info and then adp entered it wrong. So now i'm responsible for their mistake. Hopefully someone from adp will respond and help me resolve this matter.