How to match supplier purchase order with supplier invoice while booking in QB

Hi there, @nkadri.

It's my pleasure to provide steps on how to link Your Purchase Order (PO) to a bill in QuickBooks Online. 

To link the existing bill to your existing Purchase order, you'll need to delete and recreate the bill. In this way, you have an option to link the transactions. 

Here's how: 

1. Go to the Expenses tab, select Suppliers. 
2. Find the supplier's name, then locate the bill existing bill.
3. Click the drop-down arrow under Action. 
4. Hit Delete. 
5. Recreate the bill, then press the Add Purchase Order under Add to Bill. If ever cant see the Add, just click the greater than sign to show up the existing PO. 

     6. Tap Save and close. 

For more information, please visit this link: Apply a purchase order to a supplier transaction.

You can always open a different PO reports by going to the Report tab. You can customize the report so you can see particular transactions. 

See the sample screenshot below for your reference: 

You can use Pay Bills to pay a bill with a credit or debit card. For more information, please visit this link fo your future reference: How to pay a bill with a credit or debit card.

Let me know if you have additional questions. I'm always here ready to help. have a good one.