There is a 3rd party addon available which allows you to customize form printing in quickbooks. It’s pretty inexpensive addon as well. It’s called CCRQINVOICE.

<a rel="nofollow" target="_blank" href="http://ccrsoftware.com/adding-contract-pages-to-invoices/">http://ccrsoftware.com/adding-contract-pa...>

Check it out. Enjoy.