The Washington Post reports:
A confidential Internal Revenue Service legal memo says tax returns must be given to Congress unless the president takes the rare step of asserting executive privilege, according to a copy of the memo obtained by The Washington Post.
The memo contradicts the Trump administration’s justification for denying lawmakers’ request for President Trump’s tax returns, exposing fissures in the executive branch. Trump has refused to turn over his tax returns but has not invoked executive privilege. Treasury Secretary Steven Mnuchin has instead denied the returns by arguing there is no legislative purpose for demanding them.
But, according to the IRS memo, which has not been previously reported, the disclosure of tax returns to the committee “is mandatory, requiring the Secretary to disclose returns, and return information, requested by the tax-writing Chairs.”