Avalara Returns for ChatGPT

com.avalara/returns

Provides access to Avalara Global Returns API for tax returns, filing calendars, and compliance data

client:ChatGPT transport:streamable-http

Install Avalara Returns in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.avalara.com/returns

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs