What schedules are attached to Form 1040 for supplemental income and loss?

Schedule 1 is the correct attachment for supplemental income and loss when filing Form 1040. This schedule is specifically designed to report additional income that is not listed directly on the primary form and includes various types of income such as business income, capital gains, unemployment compensation, and other sources that contribute to taxable income.

In particular, supplemental income typically refers to income derived from sources such as rental properties, business activities, or other non-wage sources. Therefore, taxpayers with such income would use Schedule 1 to ensure that all possible income sources are accounted for when calculating their overall tax liability on Form 1040.

Other schedules like Schedule A, Schedule B, and Schedule C serve different purposes. Schedule A is used for itemizing deductions, Schedule B tracks interest and ordinary dividends, and Schedule C is for reporting income or loss from a business. Thus, while they play important roles in various aspects of tax filing, they are not the correct forms for reporting supplemental income and loss.