How to use system date as "AR Transaction Date" while importing tranactions from OM

Summary:

Hi,
Our customer uses Inventory and Order management Cloud for sales order shipments, then import transactions into AR.
They expect to use the system date as the Invoice “Transaction date”, when launching the import AutoInvoice process.
Multiple lines of different Sales orders and different Actual ship date will be grouped in one invoice.
Could you please provide the solution?

Thank you

Qiwen

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