After several months of being at odds, one source said, the IRS Criminal Investigation division is now sharing information about campaign associates, including Manafort and former White House national security adviser Michael Flynn. The sharing happened after the two camps reached an agreement following consultation with officials at the Treasury Department.
The FBI and IRS have been investigating Paul Manafort since before the election.
CNN has learned the IRS Criminal Investigation agents had been working with the FBI to investigate Manafort since before the election in a similar probe that centered on possible money laundering and tax fraud issues, according to the sources. [The] IRS is very restricted in what information it can share under Title 26 US Code and would normally need a specific grand jury subpoena in order to share tax returns with another agency.