{"country":"cz","currency":"CZK","name":"Czech Republic","taxYear":2025,"taxYearPeriod":"January - December 2025","description":"Czech OSVČ: Income Tax (15%/23%), Social Insurance, Health Insurance, Flat-Rate Expenses","parameters":{"income":{"type":"number","required":true,"description":"Gross business income CZK"},"incomePeriod":{"type":"string","default":"yearly","options":["monthly","yearly"]},"expenseMethod":{"type":"string","default":"flat_60","options":["flat_80","flat_60","flat_40","flat_30","actual"],"description":"80% craft, 60% trades (default), 40% professionals, 30% rental, or actual"},"expenses":{"type":"number","default":0,"description":"Actual business expenses CZK (expenseMethod=actual only)"},"vatRegistered":{"type":"boolean","default":false,"description":"DPH registered (21%)"},"weeklyHours":{"type":"number","default":40,"description":"Weekly working hours"},"paidDaysOff":{"type":"number","default":25,"description":"Annual leave days"}},"example":"/v1/calculate/cz?income=1000000"}