I agree that I also read that Single Filing Status returns are getting processed in the first waves initially, followed by Married Filing Status returns getting processed sometime after that......

With the way the IRS has been processing anything since Covid-19 struck in March of 2020, heaven only knows what their processing schedule or regimen is???  Nothing is being done uniformily by the IRS with regard to Stimulus payment processing, so why would the IRS be any more efficient or logical in the processing of amended returns to adjust for the March 2021 tax law change pertaining to the taxability of Unemployment Benefits???