Accountings in Holtsville, New York, the US. Accountings locations in Holtsville, New York. Find the nearest accountings locations, near you. All types of business services Accounting ATM Bank Finance Insurance Lawyer Real estate School All accountings in Holtsville Internal Revenue Service Finance Accounting +1 800-829-1040 1040 Waverly Avenue, Holtsville, New York 11742 Write a review Phone Website Directions Jeffrey M. Korn & Associates, Inc. Finance Accounting +1 631-207-4440 5 Hyacinth Court, Holtsville, New York 11742 Write a review Phone Directions