You're in the right place, @neil0331. I'm glad to help out.
To create a purchase order in QuickBooks Online, follow these simple steps. You'll be a pro in no time.
Go to + New, then Purchase Order.
From the Vendor ▼ drop-down menu, choose or add a vendor.
If you are shipping a product directly to a customer, go to the Ship To ▼ drop-down menu and choose the customer.
If you're using custom fields, fill them in as needed.
In the Category details and/or Item details section, enter the purchases. Note: Only the products or services marked "I purchase this product/service from a vendor" will appear in the Item details section.