This feature is available on all Goodshuffle Pro Plans.
There are a few ways to do this.
Discount Service
If you have your discount as a service (Article):
If you'd like the discount applied before tax, add tax to the discount service. If you'd like the discount applied after tax, remove the tax from the discount.
In the screenshot above, this discount will be applying before tax.
Customize Discount on a Project
You can always add/remove tax on an item on a project (Article).
Removing the tax to the Discount Line Item will result in applying the discount after tax.
Applying the tax to the Discount Line Item will result in applying the discount before tax.
Apply Discount on a Project
If you apply a discount from within the project by clicking “Add Discount”:
Goodshuffle Pro defaults to applying the discount BEFORE tax.
If you click the “Apply after tax” link, it will change when the tax applies. Clicking the link will cause the discount to apply after taxes.
You can change this again so the discount applies before the tax by clicking the “Apply before tax” link.