PeopleSoft AR and TAS/BETC: how to DR cash, received in advance, for work to be performed in future?

PeopleSoft Accounts Receivable

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PeopleTools: 8.56.16

The USSGL includes a Posting Model for "Liability for Advances and Prepayments" (Account Number: 231000). For transactions included in PS_ITEM_ACTIVITY, PeopleSoft ONLY generates TAS/BETC for AR Items (IT-01, IT-02). The TAS/BETC is generated when the "Lightning Bolt" is clicked on the "Accounting Entries" tab, while creating an AR Item. It is commonplace for a Federal agency to receive cash in advance from one of their G-Invoicing trading partners (for work to be performed during the upcoming budget fiscal year). How is that cash receipt recorded so that TAS/BETC data is assigned to the transaction (rows are populated in PS_AR_USF_TAS_BETC)?