Apply tax

You can apply tax while creating the plan.

While creating plan, you can see tax options in the tax options section, there you can select include tax, region and tax percentage according to your region, you can also apply your own created tax.

In the same way, you can apply in Invoice also, Go to Menu → Invoice → Create Invoice

While creating invoice you can apply tax in the include tax and tax column as shown below. You can also apply your own created tax.