Let's put things up in order and automate the GST component in QuickBooks Online (QBO), Bryden.  

To start, please be guided by the steps below:

1. Go to the Banking menu, then select the Rules tab.
2. Click on New Rule, give your rule a name, and set the conditions that meet your usual transactions. For instance, for utility bills, you can categorize all transactions that include the word electricity in their description.
3. In the Transaction section, select Expense. Then, under the Categorize section, choose the desired category (for example, Utilities: Electricity).
4. You can apply the GST automatically by selecting the GST code ( GST on Expenses) under the GST code drop-down menu.

Now let's proceed in Linking Receipts Automatically:

1. Utilize the Receipts tool found under the Banking menu.
2. You can upload receipts via drag and drop, email, or through the QBO mobile app.
3. Once uploaded, QBO uses OCR (Optical Character Recognition) to read the receipts and automatically match them to existing transactions based on details such as amount and date.

Then make sure to enable the auto-match feature in the settings of the receipt tool:

1. In your QuickBooks Online account, go to the Transactions on the left sidebar.
2. Choose the Banking tab.
3. Select the bank account you want to work with.
4. Once in the account, there is a settings/gear icon located in the middle right corner. Click on that.
5. Look for an option that mentions Enable suggested categorization.

Don't forget to review categorized transactions and attach receipts through the For Review tab in the Banking menu to ensure accuracy and make any necessary adjustments manually. 

Take a look at this article: GST Overview for QuickBooks Online.

It contains an introduction and answer to "What's the difference between Inclusive and Exclusive GST?".

Lastly, I encourage you to take a look at this article for reference in matching transactions: Categorize and match online bank transactions in QuickBooks Online.

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