No, I have not filed 2020 return. I've been working on the return for 2020 and realize that I didn't do it correctly in previous years (2018 and 2019). For 2020, I plan to make only deductible contribution right when I'm ready to file. Can I still correct the mistakes for 2018 and 2019 returns? If so, how? Or, can I correct everything on 2020 return?
Thanks.
