Yes, you'll have to manually adjust the Inventory Starting Value to create transactions that dated earlier than the item.
I'll show you how:
- Go to the Gear icon and select Products and Services.
- Locate the inventory and select Run report from the Action column.
- Under the Transaction Type column, click the Inventory Starting Value.
- Update the As of date box.
- Hit Save and close.
- Repeat as needed.
Please reach out to me if there is anything else I can help you with. I'll always be here to assist you. Have a good day.