Thanks for reaching out to us here, TG20201.

We currently don't have any updates on when the option will be added when printing a purchase order. In the meantime, you can add a custom field and manually enter the SKU number.

Here's how:

1. Go to + New > Purchase order.
2. Click the Gear icon located in the upper right-hand corner.
3. Select the + Add another field link and name it SKU.

Please see this sample screenshot for a visual reference:

Once added, please make sure to enter the number on the SKU field. Here's a sample screenshot to see what it looks like:

You can stay updated with news and product releases by visiting the QuickBooks Blog. If you need help with other task in QuickBooks Online, you can go to our general help topics page to see the articles and guides.

Please don't hesitate to add another reply below if you still need more help with QuickBooks Online. We're always here to help. Thanks.