Dear Raveendhrian,
Definitely it will possible to print in the INVOICE , for this you have to add logic to the existing program , you can see the program name in Tcode NACE , select V3 and click on out put types , there you can see your output type click on that and see your program name .
here you have to add the logic that pass this billing no to VBFA_VBELN & if VBTYP_V is C then fetch VBELV , and pass this to VBAK_VBELN and fetch NETWR & print in invoice .
Regards,
C.B Reddy,