I can see how going through each item changing the Income Account and Sales Tax Category fields would be inconvenient, @DMalt.
QuickBooks allows us to have flexibility in terms of choosing the right accounts for your items. At the moment, we're unable to change the default categories when adding new inventory items. You'll have to go through each of the products and services to assign their corresponding accounts.
Here are some resources that I'm sure you'll find helpful in managing your accounts and tracking your inventory:
Let me know if you have other questions about your item's accounts or setup, or anything that will make your records perfect for your business. I'm always here to help. Have a wonderful day.