Need to record payment for pre QB Q4 BAS but I don't have a BAS Liabilities Payable account to do journal entry, only GST Liabilities Payable. Is this the same thing?

They're not the same thing, Dmckjones. I'd like to explain how lodging works in QuickBooks Online.

If you have a GST liability for the quarter, you'll have to lodge the BAS first, then record the payment. Once it's lodged, the GST liability account will zero out, and the amount will transfer to BAS Liabilities Payable. Once you record the payment, the BAS Liabilities will zero out. 

Although, it looks like you're not using the lodge BAS function in QBO. That's the reason why you don't have BAS Liabilities Payable. You'll have to create this account. This way, you can record the payment through a journal entry.

Here's how to create it:

1. Click Accounting, then go to Chart of Accounts.
2. Click New.
3. Select the Account Type and Detail Type.
4. Enter the desired name, then click Save and Close.

I suggest conferring with your accountant on the best way to categorise this account.

Once done, you can now record the payment. Check this article and go directly to the How to record a GST Payment when not using the Lodge BAS function in the GST Centre section. 

You can always get back to this thread if you have more questions. Have a good day!