Grr, E-file of an amended return for 2020 not possible after October 20, 2020

My employer had to submit a revised 2020 W2-C and ADP took it's sweet time - now I can't e-file due to Intuit blocking e-filing of amended returns for Tax Year 2020 after October 20, 2021. Just venting here as it is annoying - I gather this is not an IRS rule, just an Intuit thing.