1040.com
. . .
provides all the contact information you need for your tax-related
questions.
CompleteTax
. . . serves p rimary customers such as accountants, attorneys, and audit and compliance professionals in firms and corporations. Other major purchasers of these products are U.S. and state government agencies, universities and libraries.
Electronic
Tax Filing
. . . assists
in helping you with questions on electronic filing of your taxes.
Federation
of Tax Administrators
. . . offers links
to any needed state tax form.
Financial Calculators

. . . wonderful site that offers all the financial calculators you need. There is even one that allows you to quickly use a 1040 tax form to ballpark your next year's taxes, a great form for seniors who are going on social security with 401k distribution and wanting to know how much to put aside for the feds.
Free Tax Act

Tax Act asks are you ooking to get more back in your tax refund? Sign-up today and TaxACT will send you:
- exclusive money-saving offers
- timely tax tips
- invitations to TaxACT survey
H&R
Block
. . . is a full-service
site with links to forms, a refund calculator, tax tips, and
an office locator for H&R Block offices in the U.S. and
Canada.
Federal
Tax Administrators
. . . gives you access to any state tax
form. The IRS links directly to this site and advises you it
is not a government agency.
EY
Online
. . . type in the
word "taxes" in the search box to view tax questions
from around the world.
IRS - Resource Center
Tax Resource Center. Always check here first.
IRS - Statistics
IRS page on tax statistics by household, among many other related links.
IRS Freefile - Free filing service
If your adjusted gross income was $54,000 or less, you can use Free File to prepare and e-file your taxes online.
IRS Online Partners
"Individual taxpayers, including first-time filers, Schedule C filers, and military personnel, can take advantage of a wide variety of affordable tax preparation and e-file services."
TaxCut
. . . is a popular online tax filing
package.
Taxsite.com
. . . discusses the basics of electronic
filing, estates and trusts, and more.
TurboTax
. . . is provided by the developers from
Quicken and another popular online tax filing package.