You should call the toll-free number if you: Have questions regarding a refund Want the balance due amount on your tax account Have questions on an existing installment agreement Want to confirm your payment on an individual tax return was received by IRS Want the location of an IRS office Want the location of free tax preparation services to qualified individuals Did not receive, received an incorrect, or lost your Form W-2 and 1099-R Have federal tax questions Have questions pertaining to tax returns or tax related issues IRS Hours of Telephone Service: Monday through Friday, from 7:00 a.m. to 7:00 p.m. local time (Alaska & Hawaii follow Pacific Time). The best times to call during April are before 10:00 a.m., and Monday is the heaviest traffic day. (800) 829-1040
