PeopleSoft Billing Internal Customers and AR Entries

Hello. We are currently on PS 9.2 pum 38, tools 8.57 We have question concerning Billing and AR entries.

We are implementing a billing project for one of our auxiliary units that will only process internal customers. We will automatically create invoices from downloaded data, will automatically create accounting entries for AR, Revenue, and Expenses. Our problem is that since we are only processing internal customers we do not want to use  the AR system for Deposits. With that being said we will still need to close the AR entries that are created so that there are no ‘hanging’ AR entries. We’re not sure how to manually do this and was hoping someone else has already done this process.