When can I file a 1040X amended return for my 2020 tax returns if I filed through turbotax?

I filed my taxes with Turbotax and they messed up and didn't add any of my forms (W-2 and 1098-T) only the refund relief credit was filed. Now I'm trying to file an amended return but Turbotax isn't letting me and other places are confusing. What can I do?