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In App4Legal, you can activate/Deactivate the taxes and discounts. You can do this from the Money Module → Accountant → Accountant → Settings.
From the Money section, click on the " Setup & Configuration".
From the "Activate Discount in Invoices", you can activate/deactivate Discount in the invoices. 
From the "Activate Taxes", you can activate/ deactivate taxes in the invoices.
Discounts can be added and enabled from the Invoices section. Taxes are also In App4Legal, Taxes and discounts can be added from the Money SettingsInvoices section.
From the invoices section, click on "Taxes" to add taxes to the invoice and click on "Discounts" to add discounts to the invoice.
Taxes can be added from the "Add new Invoice Tax". It can also be edited.
Discounts can be added from the " Add New Discount". It can be edited also.
For more information about App4Legal, kindly reach out to us at help@app4legal.com.
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