IRS office in Nashua, New Hampshire

The IRS runs a Taxpayer Assistance Center (TAC) in Nashua, New Hampshire. Everything on this page about the office comes from the IRS office locator (https://apps.irs.gov/tol/state/get/NH) and two IRS ITIN pages, read October 20, 2026.

Office details from the IRS locator

ItemDetail
Office name in the IRS locatorNashua
Address410 Amherst St., Nashua, NH 03063
Phone(603) 594-8370
Hours listed8:30am - 4:30pm
Appointment line (IRS, all TACs)844-545-5640

The IRS page on in-person ITIN document review says IRS TACs operate by appointment and gives 844-545-5640 to schedule one; the IRS page on TACs with ITIN services adds: “It may take several weeks to get one.”

Notices the IRS posts for this office

The IRS locator shows these notes for Nashua (read October 20, 2026; dates are the IRS’s own, month/day/year):

  • “This location will be temporarily closed during the following times:”
  • “Lunch Closure: 1:00 pm - 2:00 pm (from 12/29/25 to 12/28/26).”

Services the IRS locator lists for Nashua

The IRS office locator shows this list for the office:

  • Account inquiries
  • Basic individual tax law assistance
  • Check or money order payments
  • Departing alien clearances
  • Form 911, Request for Taxpayer Advocate Service Assistance
  • Form 2290, Heavy Highway Vehicle Use Tax Return
  • Identity Protection Personal Identification Number Request
  • Individual Taxpayer Identification Numbers and Form W-7 (More Information)
  • Payment arrangements
  • Tax forms
  • *Does not accept cash payments

ITIN (Form W-7) help at this office

  • In-person ITIN document review: the IRS page IRS Taxpayer Assistance Centers providing in-person ITIN document review (marked “Page Last Reviewed or Updated: 24-Aug-2026”) names Nashua in its New Hampshire list. The IRS says TAC employees can review original documents and certified copies from the issuing agencies required to apply for and renew ITINs, for primary and secondary applicants and their dependents, and that the documents are returned at the end of the appointment.
  • IRS list of TACs with ITIN services: the IRS page IRS Taxpayer Assistance Centers with ITIN services (marked “Page Last Reviewed or Updated: 25-Mar-2026”) lists Nashua under New Hampshire. The IRS says a TAC with ITIN services can review a completed Form W-7, authenticate most supporting documents, return authenticated documents at the end of the appointment and mail the ITIN application package. Its footnote adds: “Taxpayer Assistance Centers can authenticate all documents for ITIN applicants who appear in person, except for school and medical records for dependents. These must be mailed with the ITIN application package.”
  • Locator service list: includes “Individual Taxpayer Identification Numbers and Form W-7” for this office.

IRS-listed acceptance agents with an address in Nashua

The IRS acceptance-agent list for New Hampshire (acceptance agents - New Hampshire, read October 20, 2026) shows 2 agents with a Nashua address: 2 certifying acceptance agents and 0 acceptance agents (the IRS marks acceptance agents with an asterisk).

The IRS acceptance agent program page compares the two: a certifying acceptance agent helps complete Form W-7, authenticates supporting documents (except foreign military ID cards and any documents for dependents that aren’t passports and birth certificates) and returns them immediately; an acceptance agent helps complete Form W-7 and reviews and mails supporting documents. “Fees for service may vary,” the IRS says. Agents are private businesses; this site has no tie to any of them and earns nothing from this list.

  • AM Multi Solutions LLC — Certifying acceptance agent. 52 Walnut Street, Nashua, NH 03060 · 603-531-9260
  • Gamma Tax Services Inc — Certifying acceptance agent. 11 Northeastern Boulevard, Suite 210, Nashua, NH 03062 · 603-888-3019

Other IRS offices in New Hampshire on this site

Last verified: 2026-10-20. Office details are the IRS locator’s own values on the date read; the IRS can change hours and close offices on short notice. General procedural information — not legal or tax advice.