Manual stock count an

Please help my manual count differs from the system count for outstanding orders and stock owned,This is merely a "finger error and not a financial error therefore i need to adjust the system stock on hand some being over stated and some understated.
What is the simplest way of doing this?
I read some where a while ago overstated stock can be adjusted simply by creating a sale of the item with a 0 sales value?
How can i do the same with understated stock and stock outstanding in inventory items
We are a small operation so these types of adjustment do not have serious financial impacts as the are simple clerical errors
Thank you

Read the Guides about inventory write-offs and write-ons.