Assuming you received the link to the invoice via email, that emailed date would be the documentation you need of when the invoice was actually created. As far as adjusting that, you should take it up with the vendor that sent it to you, not QuickBooks Support.
Assuming you received the link to the invoice via email, that emailed date would be the documentation you need of when the invoice was actually created. As far as adjusting that, you should take it up with the vendor that sent it to you, not QuickBooks Support.