QuickBooks 3270 Missing posting account
QuickBooks error code 3270: Missing posting account pertains to trying to create a sales order in a version of QuickBooks that doesn’t allow sales order creation. All versions of QuickBooks will let you view sales orders, but only certain versions of QuickBooks lets you create new sales orders.
If you’re using QuickBooks Pro, you will receive that message when trying to send website orders to QuickBooks as Sales Orders. You’ll need to change the order posting type to Sales Receipts.