Most individuals use Form 1040, the U.S. Individual Income Tax Return. The simplified 1040-SR is available for seniors aged 65 and older. Your specific situation determines which schedules you need to attach:
- Schedule A for itemized deductions
- Schedule B for interest/dividends over $1,500
- Schedule C for self-employment income
- Schedule D for capital gains/losses
For 2025, the standard deduction will be $14,200 for single filers and $28,400 for married filing jointly.