“Former U.S. Rep. Billy Long of Missouri, whom President-elect Donald Trump has named his nominee to head the IRS, touts his expertise in tax matters,” ProPublica reports. “He advertises his credential as a certified tax and business advisor, and he adds CTBA to his name on his X profile. That profile encourages people to message him to ‘save 40% on your taxes.'” “But tax experts told ProPublica that they have never heard of CTBA as a credential in the tax profession.”