multi-jurisdiction-tax-calculator

# Multi-Jurisdiction Tax Calculator ## Overview The Multi-Jurisdiction Tax Calculator skill provides comprehensive tax calculation capabilities across multiple states and countries. It handles nexus determination, apportionment, and compliance with varying jurisdictional requirements. ## Capabilities ### State Apportionment Calculation - Single-factor sales apportionment - Three-factor formula application - Market-based sourcing - Cost of performance rules - Throwback/throwout rules - Combined vs. separate filing ### Nexus Determination - Physical presence analysis - Economic nexus thresholds - Affiliate nexus - Agency nexus - PL 86-272 protection - Wayfair implications ### Treaty Benefit Analysis - Permanent establishment review - Treaty rate identification - Limitation on benefits - Treaty shopping prevention - Competent authority procedures - Treaty-based positions ### Withholding Tax Calculation - Dividend withholding - Interest withholding - Royalty withholding - Service payments - Treaty rate application - Form preparation support ### Indirect Tax (VAT/GST) Computation - VAT/GST registration requirements - Input tax recovery - Output tax calculation - Reverse charge mechanism - Cross-border transactions - Place of supply rules ### Tax Calendar Management - Filing deadline tracking - Extension management - Estimated payment due dates - Information return dates - Audit milestone tracking - Statute of limitations ## Usage ### State Tax Compliance ``` Input: Comp...