I received two 5071C letters, one dated February 5, 2019, which I completed online immediately; the second one arrived today, dated February 8, 2019. They're exact duplicates, with the same Control number. I don't need to go to the website again do I?
After I completed the first ID verification online, I checked the "Where's My Refund" site and all my bars disappeared, with a message saying my return was being processed and a refund date would be given once available.
You probably shouldn't try to verify your ID online just yet.
Keep an eye on the "Where's My Refund" page for at least a couple of days.
If you don't see that your return has been accepted within a few days, you should probably call the toll-free IRS Identity Verification telephone number shown in the 5071C letter, before attempting anything else online, so that an IRS support person can best advise your next move.
You probably shouldn't try to verify your ID online just yet.
Keep an eye on the "Where's My Refund" page for at least a couple of days.
If you don't see that your return has been accepted within a few days, you should probably call the toll-free IRS Identity Verification telephone number shown in the 5071C letter, before attempting anything else online, so that an IRS support person can best advise your next move.