https://money.cnn.com/2013/02/28/news/economy/illegal-income...
> If you tell the IRS you made $1 million from stealing money or dealing drugs, does the agency tip off the cops?
> Legally, it can't, unless a law-enforcement agency gets a court order granting it access to a specific taxpayer's return. The IRS isn't supposed to proactively alert other agencies about misdeeds unless terrorism is involved. In that case, it still needs a court order to disclose anything, but the IRS can initiate the legal process on its own.