Open the 
IC Inbox Transactions window. To see
details of a transaction, select the transaction and click
Inbox Transactions,
Details.
In the IC Inbox Transactions window, enter an option in the Line Action field for each transaction. You can either fill in the field on one line at a time, or you can select several lines and then click Functions, Set Line Action and then click the relevant option.
Click Functions, Complete Line Actions...
Fill in the Complete IC Inbox Action batch job request form. On the IC Inbox Transaction tab, you can set filters to determine which transactions will be completed. On the Options tab, you specify the journal template and batch that you want to use, and other posting details. Click OK.
If any of the lines in the inbox contained Accept in the Line Action field, document or journal lines are created in your company. Open each document or journal, make any necessary changes, and post.
If any of the lines contained Return to Partner in the Line Action field, they have been moved to the outbox. Send them to your partner from there.
If any of the lines contained Returned by Partner in the Transaction Source field, post a correction to the original transaction that you posted in your company.