General Mike Flynn only decided to register as a foreign agent a couple of days ago?

[haele]

8. He registered because he was too stupid to launder the paycheck.

He's getting ready to file his taxes and needs to have been registered because the IRS received a record of his pay from the Turkish Government - as the treaties between the US and other countries concerning citizens working for foreign government dictates.

When we had to go through a training on "Tax Time" back in the 80's, they discussed how to file income from foreign nations as some NATO or embassy service members had spouses that might (or might have been prior to a marriage) be working for international companies or agencies during the tax year.
The IRS doesn't have any issue if there's a retroactive "official" recording of a foreign employer for the previous year, so long as it's done prior to filing the taxes for that year. If you waited until after you filed, there's all sorts of penalties that you face for misrepresenting your employment.

Haele