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Avalara Help Center

Why do I get the error "TypeError: cannot call method "substr" of null (AVA_Functions.js$6503#3255)" when saving my transaction?


This error (and ones similar to it) are usually cause by missing information on the transaction or hidden fields that our scripts need to read from.




  • Try using the standard form that came with your Netsuite instance, as a test, to see if your issue is the same as this one.
  • If that works, try to determine which field was hidden on your custom form that causes the error.
  • All tax related fields must be exposed at this time, including the "Tax" transaction column field.