No, TidyStock does not have the ability to attach customers' POs to the order.
Have a look at similar frequently asked questions or visit our FAQs page for more information
How can I record customer purchase order numbers in the sales screen?
Do I need to connect to Xero
Can I purchase stock in foreign currency in TidyStock?
How do I set up Tracking Categories in Xero?
Does Tidy evaluate the actual bill to the supplier?