How do I assign a PO# to a job to just use that number for all transactions?

Let me share some information on how to add your Purchase Order (PO) number to a transaction, JImC67. 

In QuickBooks Online (QBO), you can add your PO number within a transaction. If you want to assign your PO number to the expense transaction, you can type it in the Description or Memo field. However, if it is sales, you can put the PO number either in the custom fields, Description, or Memo. 

Here's how: 

1. Go to the +New located at the top left.
2. Choose a sales form and fill out the necessary details.
3. You can now enter the number in the Description field next to the Category field. You can also type it in the Memo field located beside the Attachments. 
4. Once done, click Save or Save and close. 

To learn more, you can access this guide to learn more about how to add an accepted purchase order to a transaction for your vendor: Add purchase orders to expenses, bills, or checks in QuickBooks Online. 

Furthermore, know that you can also upload your receipts to QuickBooks Online.

Keep me posted once you need our assistance when it comes to any QuickBooks-related concerns. Have a nice day.