If my taxs are being held due to a second account having to be made will they be filed after 48 hours normally?

I created a new account because when attempting to access my old password, the application was not processing my password reset request, and just kept looping me to the same page over, and over. now that i have paid, and filed on my new account i received this email from the old account : "We are holding the tax return for 48 hours to give you the opportunity to verify it's yours or stop it. If we don't hear from you within 48 hours, this return will be filed in accordance with IRS filing regulation" I just want to confirm that IRS filing regulation is just that, filing, and not some kind of drawn out investigation or something to confirm it is me. Thanks!