The ways most commonly used to prove income include showing one's tax returns, a pay stub from an employer or bank statements reflecting regular direct deposits. Other choices include getting an employment verification letter, bringing out profit and loss statement if self-employed, displaying government benefits letters or turning in other financial account statements showing assets and investment income. Documentation must clearly show your name, income sources, the period covered, and total amounts earned. Omit personal information that is not relevant, such as account numbers.