Form 1040 Schedule 5 2025. Request for taxpayer identification number (tin) and certification. Form 1040 is the basic form that all tax filers must use to file their federal income taxes.
The irs instructions for form 1040 typically include a table to help you calculate the standard deduction available to you based on when you (and your spouse, if applicable). Use the relevant tax table to find the amount to be withheld from your employeeโs gross earnings in step 1.