Hello

Follow the steps below

1. Go to inventory transactions history
2. Find the the transaction you want to reverse
3. Select the line and right mouse button, select modify date applied (in cloud click modify date applied button)
4. Enter the date you want the transaction to be applied and click OK

You must verify below conditions. 

• Your transaction may not have Has Transferred Postings column set to TRUE/YES.
• Your transaction may not be transferred to financials.
• The transaction may not be included in the inventory statistics.
• The new date of the transaction must be later than or the same as the start date of the latest period in the inventory value statistics and cannot be later than the current date.
• The new date may not belong to an accounting period that has already been closed.
• The date for a reverse transaction must not be earlier than the original transaction.

See help for more details

Regards