I want to provide discounts at invoice level. Can I?

Yes you certainly can,

• Just go to Settings – More Settings. This will take you to Preferences.
• Select the General preferences sub tab and scroll down. Here you can find a section titled Do you give discounts?
• Now, you can choose to avoid discounts, give one at invoice level or even at individual item level by checking the respective option, and include it in your invoice.
• You can also choose to apply the discount before or after tax from the dropdown.

Also remember to enable a field to display discounts on your invoices. To do this,

• Go to Settings – Templates – Invoice Templates – Edit.
• Go to the ‘Item Table’ tab, and under that check the box for ‘Discounts’ .
• Save changes.