Tax Refund Status

Turbotax Online shows that my 2021 federal return was filed and accepted on March 16th, 2022.   I received a letter dated March 31, 2022 from the IRS because I forgot to include an estimated tax payment I had made on my tax return.  They requested I mail in pages 1 and 2 of my tax return along with proof that I made the estimated tax payment.  On April 6th I mailed the IRS all of the requested information.

 

Meanwhile, the IRS refund status website does not the status of my refund, and I have not yet received the refund.  I tried calling the IRS but got a message saying to try calling back another day.

 

What should I do?