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Avalara Help Center

Why am I getting tax with a bad zip code?


You are attempting to calculate tax with postal codes only, and you want to get an error if the sip code provided is not correct, but when you use a country and zip code you see that an unexpected rate can be returned, you want to know how to ensure an error will result if the postal code provided is invalid.


Avalara AvaTax


  • Calculate tax only with the zip code (omit the country) and only valid postal codes will be accepted.


Note: We recommend providing the zip code and state/province at a minimum for a precise tax rate. Some postal codes cross state/province boundaries

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