The ability to Edit (whether deleting column(s) not used or adding a column(s) that are) really makes for a more user friendly product.  Vendors want to see a listing of adjustments (if any), and sending the corrected "Bill" instead of making adjustments to an existing PO, is the cleanest way to make that happen.

Not sure what the difficulty is in making the "Bill" template customizable like all the others; e.g; Invoices, Packing lists, Sales Orders, Sales Receipts, etc.  

These updates should be available on both Desktop and online versions.