What happens to an attorney who is caught by the IRS committing tax fraud in the sum of approximately $46,000?

Generally yes.

The IRS does not notify the Bar Association of delinquent tax obligation the are only interested in Tax payers paying there tax obligations, and if you are not then they have there own tax enforcement to make sure payment is made. The second question as to the effect on your license if there is moral and ethical issues to that tax liability then the Bar Association can review your file, but that would be a judgement call as to issue of Moral and Ethical unless its established that there was Criminal Fraud you should retain counsel to guide you during this process.