Hi Sandhya,
You can see the configuration is required for OBCA, OBCD and OBCE as below:
OBCA:
OBCD:
OBCE:
Especially play with OBCE values for Invoice processing. Of course do not forget to make your inbound configuration in NACE & WE20.
If you do not want to create your document directly then invoice parking details can be seen from OSS 501524 & 1109900 .
Good luck with the implementation!
Regards,
Selim Batur