W-2 Employer-reported wages & tax withholdings 1099-NEC Non-employee compensation, i.e. independent contractors 1099-INT Interest income from financial instituions 1099-DIV Dividends from financial institutions 1099-B Capital gains & losses through brokerages and exchanges 1099-K Payments from online platforms, apps, marketplaces, or payment card processors 1099-R Distribution of retirement benefits such as pensions, annuities, and retirement plans 1098 Mortgage interest paid 1098-E Interest paid on student loans 1098-T Qualified education expenses Bank Statements Monthly statements from banks Brokerage Statements Monthly statements from brokerages