Hi cviller,
I'm happy you're using QuickBooks to manage your products and services. I'd be happy to point you towards the right direction with making sure you're able to import the sub-types.
When importing your sample file, QuickBooks provides a sample file which shows you how to correctly format your Excel file. To find this sample file, click on Gear the icon > Import Data > Products and Services > Download a sample file. I encourage you to use the sample file as a reference point.
In case you have other questions, feel free to contact our support team using this link here.