Update on this: I went back into TurboTax online where the PTET credit is claimed and there is the following message:
Note: If you're filing by mail, be sure to attach Schedule(s) VK-1 to your tax return showing your share of the PTET credit. If you're planning on e-filing your Virginia return, mail in your documentation only after Virginia has issued you a "Missing Documentation Letter".
So there you have it. No need to send in your VK-1 if you're filing electronically until/unless the Virginia Department of Taxation asks you for it.
