How can TAS be contacted?

The correct answer is A, as the Taxpayer Advocate Service (TAS) can indeed be contacted through various channels, including the IRS website and local directories. This accessibility allows taxpayers to reach out for assistance in a manner that is convenient for them, whether it be calling a local office, utilizing online resources, or sending correspondence through the website.

Other methods suggested by the incorrect choices are limited in scope and do not reflect the full range of contact options available for taxpayers seeking help from TAS. Mailing a letter, relying solely on tax consultants, or only using fax as a means of communication restricts the avenues available for access to the services they provide. TAS is designed to help ensure that taxpayers receive the assistance they need through a variety of methods, making option A the most comprehensive and accurate choice.