The average working person might never have heard of a tax agent; you usually don’t until you really needed one. You’ve heard of an accountant, a bookkeeper and even a debt collector. Tax agents work in a niche field and are invaluable sources of help when the time comes.
Accountants have a lot of work on their plate; they analyse and generate reports, do in-depth account research for their clients and answer questions. Lots of them. Some are particular to a certain business, others are more general.