Exactly. The IRS has TONS of information on every individual and business. There may be some unreported items, but that’s the exception to the rule.

The IRS has a “transcript” with all of the many reported transactions associated with each person/entity. And you can request this transcript, which many people with complicated tax situations do so they can verify that everything is reported correctly and their records match the IRS data.

www.irs.gov/individuals/get-transcript