When New York prosecutors lastly get to look at the federal tax returns of former President Donald J. Trump, they are going to uncover a veritable how-to information for getting wealthy whereas dropping tens of millions of {dollars} and paying little to no revenue taxes.Whether they discover proof of crimes, nevertheless, may even depend upon different data not discovered within the precise returns.The United States Supreme Court on Monday cleared the way in which for the Manhattan district lawyer, Cyrus R. Vance Jr., to acquire eight years of Mr. Trump’s federal revenue tax returns and different data from his accountants. The determination capped a long-running authorized battle over prosecutors’ entry to the knowledge.The New York Times final yr offered roughly a preview of what awaits Mr. Vance, when it obtained and analyzed many years of revenue tax information for Mr. Trump and his corporations. The tax data present an unprecedented and extremely detailed have a look at the byzantine world of Mr. Trump’s funds, which for years he has concurrently bragged about and sought to maintain secret.The Times’s examination confirmed that the previous president reported lots of of tens of millions of {dollars} in enterprise losses, went years with out paying federal revenue taxes and faces an Internal Revenue Service audit of a $72.9 million tax refund he claimed a decade in the past.Among different issues, the data revealed that Mr. Trump had paid simply $750 in federal revenue taxes in his first yr as president and no revenue taxes in any respect in 10 of the earlier 15 years. They additionally confirmed he had written off $26 million in “consulting charges” as a enterprise expense between 2010 and 2018, a few of which seem to have been paid to his older daughter, Ivanka Trump, whereas she was a salaried worker of the Trump Organization.The legitimacy of the charges, which diminished Mr. Trump’s taxable revenue, has since develop into a topic of Mr. Vance’s investigation, in addition to a separate civil inquiry by Letitia James, the New York lawyer common. Ms. James and Mr. Vance are Democrats, and Mr. Trump has sought to painting the a number of inquiries as politically motivated, whereas denying any wrongdoing.Mr. Vance’s workplace has issued subpoenas and carried out interviews in latest months because it scrutinizes quite a lot of monetary issues, together with whether or not the Trump Organization misrepresented the worth of property when acquiring loans or paying property taxes, in addition to the fee of $130,000 in hush cash in the course of the 2016 marketing campaign to Stephanie Clifford, the pornographic movie actress whose stage identify is Stormy Daniels. Among these interviewed have been staff of Deutsche Bank, certainly one of Mr. Trump’s largest lenders.For all their revelations, Mr. Trump’s tax data are additionally noteworthy for what they don’t present, together with any new particulars in regards to the fee to Ms. Clifford, which was the preliminary focus of Mr. Vance’s investigation when it started two years in the past.The tax returns signify a self-reported accounting of revenues and bills, and infrequently lack the specificity required to know, as an illustration, if authorized prices associated to hush-money funds have been claimed as a tax write-off, or if cash from Russia ever moved by way of Mr. Trump’s financial institution accounts. The absence of that degree of element underscores the potential worth of different data that Mr. Vance received entry to with Monday’s Supreme Court determination.In addition to the tax returns, Mr. Trump’s accountants, Mazars USA, should additionally produce enterprise data on which these returns are primarily based and communications with the Trump Organization. Such materials may present necessary context and background to selections that Mr. Trump or his accountants made when getting ready to file taxes.John D. Fort, a former chief of the I.R.S. prison investigation division, mentioned tax returns have been a great tool for uncovering leads, however may solely be absolutely understood with further monetary data obtained elsewhere.“It’s a really key private monetary doc, nevertheless it’s only one piece of the puzzle,” mentioned Mr. Fort, a C.P.A. and the director of investigations with Kostelanetz & Fink in Washington. “What you discover within the return will must be adopted up on with interviews and subpoenas.”Still, The Times’s investigation of Mr. Trump’s returns uncovered quite a few deceptive assertions and falsehoods he has propagated about his wealth and enterprise acumen.Numerous claims by Mr. Trump of beneficiant philanthropy fell aside upon examination of his tax returns, which raised questions on each the quantity of sure donations and the general nature of his tax-deductible giving. For instance, $119.3 million of the roughly $130 million in charitable deductions he claimed since 2005 turned out to be the estimated worth of pledges to not develop actual property, generally after a deliberate venture fell by way of.At least two of these land-based charitable deductions, one associated to a golf course in Los Angeles and the opposite a Westchester property known as Seven Springs, are recognized to be a part of the civil inquiry by Ms. James, who’s inspecting whether or not value determinations supporting the tax write-offs have been inflated.More broadly, the tax data confirmed how the general public disclosures he filed as a candidate after which as president provided a distorted view of his general funds by reporting glowing numbers for his golf programs, lodges and different companies primarily based on the gross revenues they collected every year. The precise backside line, after losses and bills, was a lot gloomier: In 2018, whereas Mr. Trump’s public filings confirmed $434.9 million in income, his tax returns declared a complete of $47.4 million in losses.And such dire numbers weren’t an anomaly. Mr. Trump’s many golf programs, a core part of his enterprise empire, reported losses of $315.6 million from 2000 to 2018, whereas the revenue from licensing his identify to lodges and resorts had all however dried up by the point he entered the White House. In addition, Mr. Trump has lots of of tens of millions of {dollars} in loans, a lot of which he personally assured, coming due within the subsequent few years.The Times’s investigation additionally discovered that he faces a doubtlessly devastating I.R.S. audit specializing in the massive refund he claimed in 2010, which coated all of the federal revenue taxes he paid from 2005 to 2008, plus curiosity. Mr. Trump repeatedly cited the continuing audit as the rationale he couldn’t launch his tax returns, after initially saying he would, regardless that nothing in regards to the audit course of prevented him from doing so.If an I.R.S. ruling have been to in the end go towards him, Mr. Trump could possibly be pressured to pay again greater than $100 million, factoring in curiosity and attainable penalties, along with some $21.2 million in state and native tax refunds that have been primarily based on the figures in his federal filings.Russ Buettner and Susanne Craig contributed reporting.