Configure Shippable States

You will need to update your shipping states via the dashboard under your settings. Here's how:

Click on the pencil next to shipping info
Click on the plus sign that appears at the end of the list
From the drop down, select the state you'd like to add
Adjust your base price to account for the adult signature requirement (recommended is $5)
Enter a minimum price for free shipping or enter a high value to not have a free shipping offer
Repeat the steps above for each state you'd like to set up