Items can be modified and removed directly from an invoice on any device using the below steps. Please note, the same steps can be followed for deleting items on all other document types.                 

iOS and Android

1. Tap Invoices and open the invoice you wish to remove an item from 
2. From the invoice creation screen, swipe right to the left on the item you would like to delete and tap Delete
3. Tap Delete again to confirm

Web

1. Click on Invoices on the side navigation menu and open the invoice you would like to delete an item from
2. Click on Edit
3. Click on the item you would like to delete
4. Click on Delete