Hi info1917,
Welcome to Community! The QuickBooks Online Receipts feature is a dynamic way to upload your expenses effortlessly. After you've uploaded the receipts, QuickBooks creates a transaction that you're able to review and edit, or match it to an existing transaction. Although you can create products and services with a default tax code, there currently isn't a way to set HST as a default tax code within the snap receipt portion in the mobile app.
If you'd like to see this option added in future updates, you can submit a suggestion to our Development Team.
Feel free to reach back out if you have other questions. We'd be happy to help!