How can I enter a Supplier Opening Balance when the Opening Balance Box is greyed out in Supplier Information?

Glad to see you in QuickBooks Community, @accounts116.

The opening balance box for an existing supplier is grayed out, so adding the amount has to be done by creating a bill transaction. Follow the steps below:

1. From the Plus or Create icon, choose Bill.
2. Select the supplier name from the Supplier drop-down.
3. Enter the Bill date and indicate when the Due date is.
4. Fill in the rest of the information needed to save the transaction.
5. Click Save and close.

Check out this article for more details: Enter and pay bills.

For a new supplier, you can easily add an opening balance during set up. Here’s how:

1. From the Expenses menu, select Suppliers.
2. Click the New Supplier button.
3. Fill in all necessary information for the supplier.
4. On the Opening balance box, enter the amount.
5. Hit Save.

See How to set up customer or supplier opening balance article as your guide.

Once done, you can start recording transactions using the newly added supplier. Take a look at the Record expense transactions section on this article for reference: Record commonly-used transactions.

If you have any questions, let me know. I’m always here to help. Have a great day!