Set tax values on product with trigger or JS API

Squiz Matrix Support
1

Hi guys, I've hit a bit of a roadblock trying to set tax values on products away from the back end.

 

In the JS API, I've tried setting the attribute: 

    "price_obj": {
        "name": "",
        "value": "100",
        "calculate_tax": true,
        "value_has_tax": false,
        "_tmp": []
    }

And in a trigger, I've tried setting the price_obj attribute to set value:

Array(
  "name" => "",
  "value" => "100",
  "calculate_tax" => true,
  "value_has_tax" => false,
  "_tmp" => Array()
  )

Both methods are throwing errors and I can't seem to find a workaround.

 

Does anyone have any ideas on how to set these attributes?

 

Jeremy