I submitted my application on 12/30/22 and received my TCC's on 01/05/23.

You can check the status of to see when it's completed by going back to your eservices account under the application you submitted. Once it reads completed, you can drill down into the IRIS application to see the TCC's issued.

The IRS IRIS contact number is very helpful - they answer right away and agents are very knowledgeable.

I was told the 45 day issuance has to do with how long it might take to receive your TCC's in the mail.

Now just waiting for them to open the portal!