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Why are my customers seeing "Unfortunately, we could not calculate tax for your order" in Magento?

Overview

A customer is trying to check out but they see the error message "Unfortunately, we could not calculate tax for your order. Please try again with a different address or contact us to complete your order." repeatedly.

Environment

Magento

Resolution

  • This is the generic front end error message in Magento, it indicates there is not enough information to calculate tax
    • Typically it is caused by an invalid address, refer to your Magento logs for more information on the specific cause