What will happen to the POs if I changed the VAT after raising the POs

Hi All,

I wanted to know that

If I change the VAT of all the items from 5 to 10% on Day 1 and the same day I have raised the Purchase Orders from WH with 5% VAT.

And on Day 2, WH will deliver the orders with which VAT? Because on Day 1 Vat was 5% and Day 2 VAT became 10%.

How the invoice will behave for the same POs?

How the system will behave?

Do anyone have any idea? or can provide some information, it would be really helpful.

Regards,