Hello there, @jmcconnico. 

Welcome to the Community. To get the SKU show up in the purchase order, you'll need to turn on this feature in the Account and Settings page. Here's how: 

1. In the Gear icon, click Account and Settings.
2. Go to the Sales tab, then go to the Products and Services section.
3. Mark the box to Show SKU column.
4. Click Save, then Done.

Next, let's enable the SKU option on the Standard template. Here's how: 

1. In the Gear icon, choose Custom Form Styles.
2. Search the Standard or Master template, then click Edit.
3. Go to the Content tab, then click the middle part of the template.
4. Click the SKU option.
5. Hit Done. 

This will now show the SKU column on your purchase order. 

For future reference, read through this article and learn about how to personalize your forms, change the design, and add info: Customize your invoices, estimates, and sales receipts in QuickBooks Online. 

Let me know if you have other questions about QuickBooks Online. I'll be right here to help you. Stay safe.