A new tax calculator by the Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE campaign shows users how much they would pay in federal income taxes if they were Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE.

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Users are asked to enter their annual income, but regardless of what they enter, the result is $0.

"Donald Trump says it’s because he’s smart. The New York Times says it’s because he lost almost a billion dollars," the website reads.

"Either way, Donald Trump may have avoided paying federal income taxes for 18 years after losing $916 million in 1995. And Trump really did pay zero, or nearly zero, in federal income taxes in 1978, 1979, 1984, 1991, and 1993. Until we see evidence otherwise, we’ll assume it’s still zero."

The New York Times reported Saturday that a $916 million loss the real estate magnate reported on his 1995 income tax returns could have allowed him to legally avoid paying any federal income tax for up to 18 years.

The Times obtained fragments of Trump’s 1995 tax records, not previously released, that show the Republican nominee for president reported a federal adjusted gross income loss of $915.7 million in the wake of financial struggles at three Atlantic City casinos, his airline business and purchase of Manhattan’s Plaza Hotel.

Trump has not released his tax returns, so it's still unclear if he paid federal income tax in subsequent years.