In order to file income taxes in Philadelphia, PA, there are several documents that are required by tax preparers. These documents include W-2 forms, 1099 forms, and any other income statements received throughout the year. Additionally, taxpayers must provide documentation for any deductions or credits they plan to claim, such as receipts for charitable donations or medical expenses. One specific requirement unique to Philadelphia is the School Income Tax, which requires taxpayers who live or work in the city to pay an additional tax to support local schools. This tax is calculated based on a percentage of the taxpayer's earned income, and must be included in the overall tax filing. Overall, the process of filing income taxes in Philadelphia requires careful attention to detail and a thorough understanding of the city's specific tax laws and requirements.