Actually the story is about the NFL owners changing their minds and starting to enforcing their rules regarding player behaviour.  The tax thing is a total red herring - just Trump being Trump.  This is a man who cant get a tax cut that he campaigned on passed by his own party.  Do you really think he can pass a change in tax law to target NFL owners who don't make their players stand for the anthem.  I think you may be suffering from Trump paranoia.  Dont worry, it gets all of us from time to time.