The IRS Business and Specialty Tax Line is 800-829-4933. The IRS lists normal hours as Monday through Friday, 7 a.m. to 7 p.m. in the taxpayer’s local time; Alaska and Hawaii follow Pacific time. Confirm current availability on the official directory before calling. [1]
What does this IRS line handle?
The business contact directory lists assistance for business accounts and returns, including employer identification numbers, employment tax returns, partnerships, S corporations, trusts, estate and gift matters, excise returns, and federal tax deposit issues. [1]
| Your issue | Useful records to have ready |
|---|---|
| Missing or questioned EIN | Legal name, entity information, prior IRS correspondence |
| Employment tax account | Return type, quarter, payment dates, notice number |
| Partnership or corporate return | Tax year, form number, filing and payment evidence |
| Trust or estate matter | Entity identification and documentation of your role |
A notice may identify a more specific unit or number. If the notice is genuine, read its contact instructions before beginning with a general line. Our IRS contact verification guide explains how to assess an unexpected call or voicemail.
Who can discuss the account?
The IRS verifies identity and authority before discussing protected information. Its telephone guidance tells callers to have relevant tax records available, and representatives must be appropriately authorized. Gather the return, notice, and identifying information privately before dialing; do not publish them in a support forum. [2]
If you are calling for a client or organization rather than yourself, review IRS representation rights and the appropriate authorization. A bookkeeping assignment or possession of an EIN should not be treated as unlimited permission to access the account.
Prepare one clear question
Write a short issue summary with the form, period, and requested action. For example: “The payment dated June 10 appears under the wrong employment-tax quarter. I have the payment confirmation and the notice. What documentation is needed to correct the posting?”
During the call, record the date, office or employee identification supplied, instructions, and any expected response date. Repeat the required next action before ending the conversation. This reduces the chance of calling again with the same unresolved routing question.
Can you resolve it without calling?
Eligible users of IRS Business Tax Account can access services based on their business type and role. The IRS now describes a downloadable EIN verification notice in the account’s Tax Records area. Other account records and available actions vary, so check eligibility rather than assuming every entity has identical access. [3]
For a move or new responsible party, see Form 8822-B. If you are trying to reuse an older number, see EIN verification and reactivation questions. Those tasks may require different records even though both concern the same business.
How long will you wait?
There is no fixed waiting time promised in this guide. Use any estimate or callback option provided during the actual contact, and allow time for identity verification and account research. A claim that a particular weekday or minute always avoids the queue would not establish what will happen to your call.
If an employee creates an inquiry referral, ask for the expected response date and read what Form 4442 means. A referral response period and the time spent waiting on the telephone are separate timelines.
Primary sources
- IRS: Telephone contacts for business customers
- IRS: Information to have ready before calling
- IRS: Business Tax Account features and eligibility
Sources checked: October 31, 2026.