{"country":"us","currency":"USD","name":"United States","taxYear":2025,"taxYearPeriod":"January - December 2025","description":"US Federal Self-Employment Tax & Income Tax Calculator (Single Filer)","parameters":{"income":{"type":"number","required":true,"description":"Net self-employment income USD"},"incomePeriod":{"type":"string","default":"yearly","options":["monthly","yearly"]},"filingStatus":{"type":"string","default":"single","options":["single"]},"qbiDeduction":{"type":"boolean","default":true,"description":"Apply QBI deduction (20%)"},"weeklyHours":{"type":"number","default":40,"description":"Weekly working hours"},"paidDaysOff":{"type":"number","default":20,"description":"Annual leave days"}},"example":"/v1/calculate/us?income=100000"}