Do you mean a 2019 tax return? 2019 cannot be e-filed after Oct 15, 2020.
A 2020 tax return cannot reject since it is too early to even file a 2020 tax return before Jan 31 2021 or later - the 2020 forms are not even ready yet.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
