Can I make all my accounts balance to zero since I have mistakenly posted the opening balances including the inventory values?

Yes, you can still edit your Opening balance to zero through the Chart of Accounts.

Here's how:

1. Go to All apps, hover your mouse over Accounting, then Chart of Accounts.
2. Find the account and click on View Register.
3. Choose the opening balance entry that shows Opening Balance Equity as the payee.
4. Edit the date and the amount.
5. Select Save.

Please be aware when you edit your Opening balance, your previously reconciled transactions will also be affected.

You can also correct your inventory. Here's how:

1. Go to All apps, hover over Sales & Get Paid, and select Products and services.

2. Select the inventory that needs correction.
3. Next to the Edit dropdown, click on Adjust Quantity.
4. Then, select Save and close.

After making your corrections, you can verify the changes by running the Inventory Valuation Summary report.

You can always respond to this post if you have additional concerns.