I haven’t read all this yet. See Long-Concealed Records Show Trump’s Chronic Losses and Years of Tax Avoidance.
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.
For a quickie summary, see 18 Revelations From a Trove of Trump Tax Records.
This is going to take some time to digest.