Is StartDate the Order date?

Is the Infusionsoft field “StartDate” considered the Order date?

StartDate is the date/time of the invoice, not to be confused with CreationDate which is when the physical record was created. So if you had a manual invoice from yesterday, then the StartDate field would indicate yesterday.

Ok So if I used StartDate to bring over a date from a webhook for an order/job, it would become the “Order Date” under Order information inside an invoice/job??

Yes, but note that their are other dates that, for reasons unknown to me, will not match up. The payment plan date, and the payment dates there are no way to adjust with the api. The order will have the right date for order date but the payment and payment plan dates will have the date they were created with the api.