Is there a way to add automatic percentage to sale? without using the tax option?

[LosIslenos]

The other threads regarding this issue are from 2016-17.  

Is there a current option for me to add a percentage fee to an invoice total? without using the tax option?

Thanks

[VanKalkerFarms]

to do it automatically you would need to use a tax option.  you can add an item and calculate the amount the percentage would be.