Tax Return & Filing Services | Payroll Processing Services | HR Management Solutions | Trivantus, New Hampshire
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Tax Filing Services

Tax Filing


Our comprehensive tax filing services and decades of experience give you the confidence that all regulatory and compliance challenges are met. Trivantus has the expertise you need. Get back to your day-to-day responsibilities and leave all of the tax filing and compliancy rules to us.

73,984 pages of tax code
creating daily questions

From payroll taxes, W-2s and 1099s you can trust Trivantus to help navigate and control these processes. Trivantus calculates, deposits and files all federal, state and local tax returns with the respective agencies and responds to any notices that are received.


Address: 20 Market Street
Manchester, NH 03101
Mailing Address: PO Box 6655
Manchester, NH 03108-6655
Fax: 603-647-9911


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about us

Founded in 2003, Trivantus is a leader in payroll services, employee benefits and human resource administration. Our philosophy is based on employing relationships through excellent communication. We believe in true customer service and stand behind this commitment. Owned by the Gatsas family, Trivantus is no stranger to success. Michael Gatsas co-founded Staffing Network, a Professional Employer Organization which grew to be one of the largest employers in New England.