How to set up GST on sales and purchase?

Hi ambica@couch9.ca,

Welcome to the Community! QuickBooks Online allows you to set up provincial and custom tax codes in a few easy steps. I can walk you through how to complete the set up of your GST. 

Here's how you can set up GST for your sales and purchases: 

• Navigate to Taxes in the left hand menu.
• (Note) If you use Payroll, you may have to click on the Sales tax tab. Otherwise, you'll be brought directly to the Sale tax tab.
• If there hasn't been any sales tax codes set up in this QuickBooks Online account before, the screen will have a green button prompting you to set up sales taxes. From there, you select your province from the dropdown menu, select the starting month and remittance frequency. Once everything is ready, click Save.
• If sales taxes have been set up in this account before and you have to add an additional tax code, select Manage sales tax.
• Click the Add tax button to the top right.
• Under What type of tax do you want to add? select Add next to either Provincial, Group or Custom sales tax code and follow the prompts to complete set up.

You'll then be able to select the sales tax code when processing sales and purchases. You can learn more about setting up sales taxes here: 

How to set up a new sales tax code.

If you're interested in using automation features to streamline the tracking of sales taxes, you can find details about how to set that up in this Community article: Set up and use automated sales tax in QuickBooks Online

Please let me know if there's anything else I can help you with!