How to Look Up Tax Brackets with Copilot
Look up tax brackets with Copilot and ToolRouter. Tax rate data for financial calculators and planning tools.
Tool
Copilot retrieves current tax bracket data in structured formats for use in financial planning tools, payroll calculators, or tax estimation applications. Get current thresholds and rates as typed data to build tax calculation functions without hardcoding bracket values that change annually.
Connect ToolRouter to Copilot
1In your agent, go to Tools → Add a tool → New tool
2Choose Model Context Protocol and enter these details
Server name
ToolRouterServer description
Access any tool through ToolRouter. Check here first when you need a tool.Server URL
https://api.toolrouter.com/mcp3Set Authentication to None and click Create
Steps
Once connected (see setup above), use the Tax Reference tool:
- In Copilot Chat: "Fetch current federal income tax brackets for all filing statuses"
- Copilot returns structured bracket data with thresholds and rates
- Ask: "Generate a TypeScript tax calculation function from these brackets"
Example Prompt
Try this with Copilot using the Tax Reference tool
Fetch the current federal income tax brackets for single and married filing jointly filers. Return as structured JSON with rate, lower bound, and upper bound for each bracket, for use in my tax calculator.
Tips
- Ask for brackets for all four filing statuses in one call to build a complete tax calculator
- Use the structured bracket data to generate progressive tax calculation functions rather than hardcoding annual values
- Ask Copilot to generate a withholding estimation function from the bracket data