Yes, you can ship anything with ZenSales! To manually create an order, click the "New Order" button on the orders dashboard.
This will open a modal that will prompt you to enter the customer's name. As you type, you'll see a list of customers that you can ship to. If your customer isn't yet in ZenSales, you can click the "CREATE NEW CUSTOMER" link.
After you choose a customer, you can fill out the order with any additional details you wish.
If you just need to quickly print a label, you are not required to add products or give us any additional information, but the more information included, the more accurate your reports will be.