Add field for credit_invoice form.
Add field for credit_invoice form.

hauledev/bookyt,silvermind/bookyt,silvermind/bookyt,xuewenfei/bookyt,hauledev/bookyt,gaapt/bookyt,gaapt/bookyt,xuewenfei/bookyt,huerlisi/bookyt,wtag/bookyt,hauledev/bookyt,gaapt/bookyt,xuewenfei/bookyt,huerlisi/bookyt,wtag/bookyt,gaapt/bookyt,huerlisi/bookyt,silvermind/bookyt,hauledev/bookyt,silvermind/bookyt,wtag/bookyt