It’s on again.Three days after upholding a defendant’s sentence for tax fraud and failure to appear and two days after yanking its opinion as “improvidently issued,” the 7th U.S. Circuit Court of Appeals on Thursday again ruled in the case.And the court again rejected Destry J. Marcotte’s challenge to the 78-month prison term he was ordered to serve.The court changed one sentence in its opinion.In Monday’s opinion, the court said it reviewed the trial judge’s legal interpretation …