Hello @paulc4 ,
Perpetual inventory system adjustments are done as follows:
1. If the physical inventory count shows a higher balance than the inventory system, you must DR Inventory (Asset) account, and CR COGS (this can be a COGS type account named something like Inventory Adjustments).
2. If the physical inventory count shows a lower balance than the inventory system, you must DR COGS Inventory Adjustment account and CR Inventory (Asset).
Because of the way QBO does inventory adjustments, you simply need to go to Sales-->Products and Services-->Inventory item you want to adjust-->drop down Edit in the Action column-->Adjust quantity-->Choose your Inventory adjustment account-->Enter discrepancy in Change in Qty column. Depending on whether your total QTY goes up or down, QBO will make the accounting entries correctly in each account; you don't have to determine the DR or the CR - it is done for you.
Good luck!