Adding LTV to a customer

If I am not able to import all past invoices, is there a way to manually enter LTV for top customers?

Or would I have to upload some fake total invoices to do that?

Blessings,
Betty

Just thinking out loud, but if I were to go the fake invoice route, I would make a special order type and/or dept just for this, and of course a SKU to contain it. Whatever you need to do to have it not show up where you don’t want it.