Hello,
Have some experience with advanced use of purchase orders in Business Central.
I have made a purchase order with a 100% advance payment. This advance payment is reconciled with the bank account.
Subsequently, more costs will be added to the order. It is, for example, some extra work with the supplier on the order and that the shipping costs were a mistake and became larger.
How to add these additional costs when the order is reconciled and closed
You should be able to re-open the purchase order and add the new lines. You won’t be able to change the line with the prepayment, but adding new lines is permissible.
This is a very interesting topic. I’ve worked with Business Central in similar situations. When adding extra costs like shipping or additional work, I usually post the purchase order invoice first. After that, I create a new purchase invoice or credit note to add the extra charges. This helps to keep everything accurate and properly reconciled. It’s been a helpful process in my experience!