Customizing PO number to start with the year

Hi @TheSuz, I'll help customize your purchase orders.

You're on the right track. The transaction numbers in a purchase order is changed manually and the sequence will follow in every entries created in the future in QuickBooks Desktop. 

Since it doesn't let you do so, let's run the QuickBooks utility to determine why and resolve it accordingly. I'll show you how.

A. To Rebuild Data

1. Go to File.
2. Click Utilities.
3. Select Rebuild Data.
4. Click OK.

B. To Verify Data

1. Go to File.
2. Click Utilities.
3. Select Verify Data.
4. Click OK.

Here's a link you can read to learn more about the troubleshooting steps: How to Fix Possible Data Damage on your Company File in QuickBooks Desktop?

However, we may need to continue our troubleshooting steps to fix your items' prices l if the tool above didn't perform any changes. Use this link for reference: Run Quick Fix my Program from the QuickBooks Tools Hub.

I'm adding these articles with the topics you can use while recording the common vendor transactions: The Vendor Transaction Workflows in QuickBooks Desktop.

It'll always be my pleasure to help if you've got additional questions about purchase orders. Use the Reply option below and surely I'll be here ready to assist you. Take care and stay safe!