I would like to know if this is possible to have checkout attributes using percentage instead of fixed amount. In my case, a comission of 10% is added at every order. To do so, I would like to add a checkout attribute. However, it seems that percentage checkout attributes are not supported
How to do that ? Is there any plugin that I can use for that purpose ? If this task required development, what needs to be updated ?
I'm not aware of any plugin that can do it. Have you considered adding the fee on to shipping or payment method: Payment Method "Additional fee. Use percentage", or Shipping FixedByWeightByTotal?