How the physical adjustment are done by Inventory Physical Inventory?

Greetings to all,
I have been reading about the topic I am asking for, but it is not clear how the adjustments are done in the inventory.
We are managing items under lot control.
The physical inventory adjust lot number differences? and when the items are under lot control and locators?
Why these questions? because we need to know how these adjustmente affects the inventory accounting. Is a tax situation, as some differences could cause extra tax payments.

Thanks in advanced,