After you file

When at all possible efile the return.  You got the textbook canned response from the IRS but the truth is until the IRS data input operator enters your return in the system you will not be able to track it and due to the human shortage at the IRS that can take months to happen.   Others have reported delays in mailed in returns of months and months.  If you mailed them to the correct address then all you can do is wait.