Actually at the time of entering the first journal entry, you need to check the reversing entry and provide the reversing date. based on this reversal entry is posted automatically.
Try this, while creating new general journal batch, check the reversing entry and reversing date as any date after posting date. On the journal line, enter the journal detail. Reversing data will be populated automatically. When you post the transaction, two vouchers will be posted. Hope this helps…
Pranav…