I am getting the same error. PNC Investments has published an availability date for 1099s of 2/15 ... I'm hoping that for some reason TT isn't "turning on" PNC IDs until then. I'll try later this week. If not then this is, once again, a TT / PNC issue ... which seems to happen almost every year.
Update ... using National Financial as the institution and logging in with PNC credentials worked. Kudos to @heintz14 for the workaround.
