By the time his master-of-the-universe memoir “Trump: The Art of the Deal” hit bookstores in 1987, Donald J. Trump was already in deep financial distress, losing tens of millions of dollars on troubled business deals, according to previously unrevealed figures from his federal income tax returns.

Mr. Trump was propelled to the presidency, in part, by a self-spun narrative of business success and of setbacks triumphantly overcome. He has attributed his first run of reversals and bankruptcies to the recession that took hold in 1990. But 10 years of tax information obtained by The New York Times paints a different, and far bleaker, picture of his deal-making abilities and financial condition.

The data — printouts from Mr. Trump’s official Internal Revenue Service tax transcripts, with the figures from his federal tax form, the 1040, for the years 1985 to 1994 — represents the fullest and most detailed look to date at the president’s taxes, information he has kept from public view. Though the information does not cover the tax years at the center of an escalating battle between the Trump administration and Congress, it traces the most tumultuous chapter in a long business career — an era of fevered acquisition and spectacular collapse.