Sales Order marked as shipped but is not

Thanks for coming here, @Liftco.

Let me help you with what to do to the Sales Order (SO) that you accidentally marked as shipped.

Since SO is a non-posting transaction, we can Delete it and recreate it.

Here's how:

1. In the upper tab click Customer, and select Customer Center.
2. Look for the customer that has the SO that you accidentally shipped.
3. Click the SO transaction.
4. In the transaction form, tap the Delete icon above. 
5. Once done, recreate the SO transaction.

You might want to learn about the Sales Order Fulfillment Worksheet. Feel free to read this article: Use the Sales Order Fulfillment Worksheet.

If you have additional questions about managing your SO transactions, don't hesitate to reply to this post. Have a good one.