You can check your
e-file status to see the exact date that your return was accepted by the
IRS by following the instructions below.
https://ttlc.intuit.com/replies/3319882
This
year it seems to be taking much longer for returns to get accepted and begin
processing. Until the IRS starts processing it on their own, you may
not find record of it or the website may say that you have put in
incorrect information when tracking your federal refund. As your return
moves through the system, the status of it will be updated accordingly.
https://ttlc.intuit.com/replies/4193097