Cannot e-file amended 2020 returns

Why is TurboTax not allowing me to Efile amended 2020 return even when IRS clearly says I can efile amended 2019 2020 returns? 
i get an error message that the efiling was closed in October 2021. That is not correct as per IRS

i am being asked to print a 165 page document and sent to IRS!!

why did I pay for premier when basic functionality is not provided

also the only reason I have to Amend is because i realized that TurboTax completely messed up my k1 calcs