This chapter discusses gross income and exclusions. It defines gross income for tax purposes and explains when taxpayers recognize income. It discusses the various sources of income, including income from services, property, annuities, and other sources. It also covers the major exclusion provisions that allow taxpayers to exclude or defer certain types of income from gross income, such as municipal bond interest, home sale gains up to $250,000, education-related exclusions, and foreign earned income up to $97,600.