Tax Information 

IRS.gov
Electronic Federal Tax Payment System - If it's not on our site, it's here.
Where's My Refund?
SS-4 EIN Online Application

Government 

Fedworld - a gateway site to various US Government web pages
Internal Revenue Service
Social Security Online
Department of the Treasury
Consumer Price Index

State Information 

Florida Department of Revenue

Jacksonville 

Jacksonville Chamber of Commerce
The Business Journal

Investment Advice 

Investor's Business Daily
Bloomberg Online - free current financial and world news

Accounting Associations 

AICPA - American Institute of Certified Public Accountants
FICPA - Florida Institute of Certified Public Accountants

Accounting Software 

QuickBooks
Peachtree

Personal Finance & Retirement 

TCalc - online financial calculators