Aside from having it drilled into my head by my accountant (I actually pay my taxes), I have sustained two large audits by the IRS (I did well in both of them) where the rules were very clearly explained.
The BBC's Vincent Nnanna, in Cotonou, says the accountant is the head of a major business and an associate of Patrice Talon, the man being held in connection with the 2012 poison plot.