Hi guys, I've checked everything in Enable Features and it looks correct. However, I still can't get the project field to appear on my sales orders and invoices. What did I miss?

Did you modify your forms to expose that field? I believe it is called Job and not Project. I might have renamed it. You are quite limited as to what project information can be displayed on the SO and Invoice forms, pretty much limited to the External ID of the project.

Multiple fields are disabled, including project, when I look at the configuration of the custom form. i.e. date, customer, subsidiary and doc#