To find out how to receive  free tax preparation see our Programs page. 

Cornerstone Tax Services LLC

54 Dover Point Road Ste 101

Dover NH 03820

(603) 343-2393


Monday thru Thursday 9:00 am to 6:00pm
Friday 9:00 am to 4:00 pm

Saturday 10:00 Am to 4:00 PM

Sunday By Appointment Only

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- free parking!!!

Cornerstone Tax Services, LLC provides tax, bookkeeping and payroll services to both individuals and businesses, as well as guidance with small business start-up. We give the same attention to all clients, no matter how large or small. The accounting, tax preparation, and other financial services we provide are tailored to the unique needs of each client, ensuring the best possible results and maximized returns. Our firm remains on the cutting edge of tax law and financial trends. We are well-informed and continually adapt to the ever-changing world of tax law and accounting.

Our Record

Our consistent track record of uncompromising ethics instills confidence and trust. We use cutting edge technologies to ensure up to the minute information from the financial world. This allows us to respond quickly, and give you the most relevant information and perspectives.

Our Affiliations

We are members of:

The Greater Dover Chamber of Commerce
The Barrington Chamber of Commerce
Cochecho Networkers 
NATP - National Association of Tax Preparers
AIPB - Association of Professional Bookkeepers
BBB - Better Business Bureau of New Hampshire 




Our Affiliations



Our Commitment

‚ÄčAt Cornerstone, we treat our clients with courtesy and integrity. Our staff of federally registered and bonded tax preparers will take the time to investigate every aspect of your return to ensure you only pay the taxes required. We guarantee efficient, honest tax service that achieves remarkable results. Our years of experience and notable expertise ensure that your tax preparation is in good hands.

We Guarantee you will pay AT LEAST 15% less in tax prep fees than you did last year*