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Sales Tax on Invoices: The Basics Before You Add a Tax Line

Sales Tax on Invoices: The Basics Before You Add a Tax Line A freelancer copies a tax rate from an old invoice and sends a new bill.

  • Sales tax is a transaction tax collected by the seller at the state and local level.
  • VAT and GST function differently at a multi-stage tax level on value added.

Free-tier LLM gateways: test the fallback before you commit

A free tier is a trial allowance, not a permanent price. The useful question is what happens when that allowance runs out: does the request stop, switch to a paid model, or fail silently?

  • Test fallback mechanism before committing to free-tier gateway
  • Gateway should seamlessly transition to paid model or provide transparent error message
  • Verify compatibility with major LLM providers like OpenAI or Anthropic

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