We received a credit for items we were overcharged for from the beginning of 2020 through 5/1/2021. We need to make a cost of goods adjustment for two dozen items for these items and have it reflected in our sales reporting for last year. preferably item level to see an update GP by territory. Can someone offer some advice to get me headed down the right path?

We have looked at a standard vendor credit. However, if we want to adjust to the item level it impacts our inventory levels.