[GNC] Itemize multiple tax entries in invoice

[Jay Thompson]

I use a tax table that contains multiple entries. For example:
Tax table entries:
1- Federal ; 5%
2- State ; 7%

The tax breakdown *absolutely* needs to show up on the invoice. For
example:
1 item            = $100
*Federal tax* = $5
*State tax*     = $7
                      ======
Total price     = $112

Currently, GnuCash lumps all taxes under a single line item in the invoice.
How can my invoice breakdown and itemize the different tax entries on the
invoice? I also need to specify what each line item represents. I don"t
want it to simply say "tax".