James Castaldo CPA & Associates | 631-302-1945
Clutch badge Clutch badge

Welcome to James Castaldo CPA & Associates

Certified QuickBooks® ProAdvisors. We Have Convenient Offices in Lake Grove and Melville!

accounting customer service


Stop struggling with QuickBooks problems, take comfort in knowing that a solution to your QuickBooks problems is just a phone call away.



Our Long Island QuickBooks ProAdvisors will make sure your QuickBooks software is setup and installed and set up right the first time.

accounting services


We can review and clean up your QuickBooks file on a monthly or quarterly basis and assist you in recovering work entered.

Accounting strategies


We customize the lessons around the precise needs of your business so you don’t waste time learning about functions you’ll never use.

QuickBooks Help for Small Businesses

James Castaldo CPA & Associates delivers complete QuickBooks® accounting support services to local businesses on Long Island. We'll help you and your employees learn to use QuickBooks efficiently so you can maintain accurate records that will help you manage the financial condition of your business. If you’re new to QuickBooks, we can start by installing and setting up the software. Next we conduct personalized training sessions at your office to teach you how to use all the important features of QuickBooks. From there we’re only a phone call away when you need assistance to troubleshoot a problem or just have a question.

Don’t go it alone, our Long Island CPA firm has highly trained Certified QuickBooks ProAdvisors ready to assist you. Call us at 631-302-1945 today to get started.


accounting service

The right POS System

Let us make sure you’re using a QuickBooks package that works symbiotically with your POS system.

Learn More
tax services

FREE Consultation

Fill out our simple form and we'll be happy to get in touch on how we can help.

tax center

Tax Center

Access our robust tax center complete with financial calculators, tax tips, organizers, and more.

send a file

Send a File

Send a secure encrypted file to James Castaldo CPA & Associates with our simple to use file share system.


enhancer our offices


68 South Service Road Suite 100

Melville, NY 11747

Telephone: 631-440-5447

Get Directions on the map

Lake Grove

6 Forest Avenue

Lake Grove, NY 11755

Telephone: 6313021945

Get Directions on the map


150 Motor Parkway

Hauppauge, NY 11788

Telephone: 631-824-0046

Get Directions on the map