The journalist at the centre of the Donald Trump tax return story has hit back at the President, suggesting he is guilty of a "fake tweet."
Mr Trump had suggested the tax return, published by MSNBC, was not authentic and said the story is merely "fake news."
The President also mocked the journalist who first obtained the document, David Cay Johnston, saying noone had ever heard of him.
However Johnston has now replied by Twitter, writing: "Gee, Donald, your White House confirmed my story. POTUS fake Tweet. Sad!"
The tax return shows Mr Trump's earnings and contributions for 2005. It revealed the president earned more than $150 million (£123 million) and paid $38 million (£31 million) to the government in tax.
MSNBC published two pages of the document, citing Johnston as the person who had supplied it.
During the election campaign, the President steadfastly refused to release his tax returns - breaking a long-held tradition for prospective occupants of the Oval Office.
He claimed he was under audit and had been advised not to release his tax returns, and consquently, little is known of his tax affairs.
As a result, the partial leak offers a glimpse into how the President conducted his affairs before taking office.
The White House has condemned the leak and MSNBC's subsequent publishing, which the latter has argued is in the public interest.
At the moment, President Trump has not responded, via statement or social media, to the leak.