Using Australia Post rates and Shopify rates at the same time
It is possible to use Australia Post rates as well as your own custom rates at the same time. Your setup will depend on the reason for the custom rates.
If you're using the custom rates to provide free shipping on items based on order weight or price, follow this guide to find out how to add custom rates & Australia Post rates to the same shipping profile.
Usually though, you would set up multiple shipping profiles; one for products with Australia Post rates, and one for custom rates. Here's an example of why you might do that:
Let's say you sell flowers and boxes of chocolates. You can ship the chocolates with Australia Post but you're using a courier for the fresh flowers.
You could set up two shipping profiles, one for each type of delivery method.
For the shipping profile for the courier rates, you want to make sure not to enable the Addition app so that it doesn't display Australia Post rates to your customers, but uses the rates you've entered manually instead.
Watch this video or follow the guide below to find out how.
Assuming you already have a Shipping Profile set up with Australia Post shipping rates, you now want to create a second Shipping Profile without Australia Post shipping rates.
Go to your Shopify Dashboard. For example: storename.myshopify.com
Click Settings in the bottom left corner. Then Shipping and delivery from the list of options.
Here you can see there is already a default shipping profile called 'General Shipping Rates'. Click Create new profile on the right.
Give your new shipping profile a name, and add the products you wish to link to this shipping profile.
Next add zones to your shipping profile. Scroll down to the 'Shipping to' section and click Create shipping zone. Name and add locations that make up your new zone and click Done.
Next add Rates to your new shipping zone, click Add rate.
This is the important part: Leave the rate set to Set up your own rates.
Give your rate a price and click Done.
Make sure to save your changes, click the Save button to save the new shipping profile.
Congratulations, now you've set up multiple shipping profiles, one for your general items using Australia Post rates and one with your own custom rates.