The federal government has long struggled with protecting its massive amounts of data safe from hackers. It's not always been successful, with huge security breaches at the Office of Personnel Management and other agencies exposing sensitive personal information on millions of citizens.
The federal government collects mountains of data on almost every subject imaginable -- including how much money Uncle Sam takes in from taxpayers, and spends on various budget items. Getting all that informaiton in one place, and presented in a way that's easy to understand has always been a challenge.
The Joint Committee on Taxation has released a report in which it estimates the difference between the amount of taxes the federal government collects each year, and the amount it estimates the government should have collected, if everyone paid what they owed.