Donald J. Trump paid $750 in federal income taxes the year he won the presidency. In his first year in the White House, he paid another $750.

He had paid no income taxes at all in 10 of the previous 15 years — largely because he reported losing much more money than he made…

The tax returns that Mr. Trump has long fought to keep private tell a story fundamentally different from the one he has sold to the American public. His reports to the I.R.S. portray a businessman who takes in hundreds of millions of dollars a year yet racks up chronic losses that he aggressively employs to avoid paying taxes. Now, with his financial challenges mounting, the records show that he depends more and more on making money from businesses that put him in potential and often direct conflict of interest with his job as president.

The New York Times has obtained tax-return data extending over more than two decades for Mr. Trump and the hundreds of companies that make up his business organization, including detailed information from his first two years in office. It does not include his personal returns for 2018 or 2019. This article offers an overview of The Times’s findings; additional articles will be published in the coming weeks.