Hi there usermberard2,
Accurately accounting for sales tax is an important part of managing your books. Luckily QuickBooks Online makes this an easy process with the Sales Tax module. I want to provide you with some information that'll point you in the right direction.
It sounds like you're looking to enter a transaction to represent GST paid or collected that affects your Chequing account in the Chart of Accounts. This type of transaction can be recorded as a journal entry, but I recommend that you reach out to your accountant when it comes to entering these. An accountant knows how best to record the entry to have it debit and credit the appropriate accounts in the correct amount.
If you're already working with an accountant, they can join you to work on your books in QBO. Simply navigate to the My Accountant tab from the left menu and enter their email address to send an invite. If you're not yet working with an accountant, the Find a pro to help button on the same page will take you to our database of QuickBooks-certified accountants that are more than happy to support you and your business' needs.
The recommended way to account for HST/GST in QuickBooks Online is using the Taxes module from the left menu. Once set up, you'll be able to select the appropriate tax code for each transaction you enter and QBO will automatically track the amounts for you. Once you're ready to file, you can record the filing and payment or refund from the same page. While QuickBooks doesn't file directly to the tax agency for you, it'll pull the data from your transactions to show you the correct amount you should be remitting.
Here's a great article to help you get set up using the sales tax module in QuickBooks Online:
I'll be here if you have any follow-up questions. Have a great day!