I term described would be happy to testify in front of Congress. And I have sent info to many congressmen (none have responded - info was sent in mid '10') so indicating.
Specialization: Florida tax law is very complicated. Only someone who is well aware of the ins and outs of the law can handle a case successfully. Tax lawyers have specialization in this field. Many people try to study a bit of tax law and solve the case themselves. But tax lawyer can handle the case better than anyone else.
Answer: First, you should not be afraid to see a lawyer. Lawyer's have what is known as the Attorney-what is Privileged communication. This means that whatever you say to a lawyer cannot be discussed with anyone. If it is, then there is a very serious violation of the Professional Ethics of Responsibility.
One final thought, don't forget that it's very easy for your comments to be recorded and/or videotaped. Many cell phones can take short videos and digital cameras are credit card sized. Don't end up on YouTube...then the nightly news...unless you planned it!
Your deposition will be taken in a lawyer's office, probably at a conference table. The attorneys for the other side will have an opportunity to ask you questions. Your lawyer will also be there to protect you from unfair questions and to make necessary objections.
I have had clients in the past who did not tell me they had prior deportation orders. When the time came to submit everything, these people could have easily been detained and deported. Luckily, I found out the truth. However, had I not found out the truth, there cases would have been severely compromised.