How do I create multiple purchase orders to the same vendor. Whenever I pull the vendor up that already has a purchase order, it makes me replace it.

Let me help you create multiple purchase orders to the same vendors, dsgnrjoan.

If you are referring to items automatically shown when creating purchase orders, it's possible the Pre-fill forms with previously entered content option is enabled. This feature automatically fills other fields of the form based on the last saved transaction for customers, vendors, or employees.

You can turn-off this one if you are not comfortable with this feature.

Here's how:

1. Go to the Gear icon on the top menu.
2. Choose Account and Settings.
3. Tick the Advanced tab.
4. Tap the Pencil icon in the Automation section.
5. Uncheck the Pre-fill forms with previously entered content option.
6. Press Save.
7. Click Done.

To create multiple purchase orders to the same vendors, just follow the steps below:

1. Click the New Plus icon.
2. Choose Purchase order under Vendor.
3. Enter all the necessary details.
4. Tap Save and new. Then, create another transaction for that vendor.

For more details about this one, check out this article: Create purchase orders in QuickBooks Online. 

I've got a link here that provides you with articles about managing your purchase orders: https://quickbooks.intuit.com/learn-support/en-us/expenses-and-vendors/purchase-orders/08?product=Qu....

Keep me in the loop if you need a hand with running vendor reports or any QBO related. I'll be here to help. Keep safe and healthy.

@dsgnrjoan 

You may find the Blanket Purchase Order in the inventory management app