We have released a new version of Invoice Fees that allows you to search through a standard list of your shop's Fees. Add a list of fees to your settings (by visiting My Account-->Invoice Fees), and even set specific fees to add as default on all new Quotes. This update also includes a quantity field, percent field, and a 'Fee Total' and 'Item Total' to the Totals section.

We we be releasing an improvement to Invoice Fees soon where shops will be able to set fees within their account, search for and use those fees on individual orders, and see Fee totals on each order as well.