I filed my tax return on May 15th, 2021. I had my gross income for 2020, and so, I sent it through by mail. But, I had no response from IRS. Now, I found my gross income for 2020. If I send my application now eletronical now, can duplicate filing cause any problem? I, now as trying to track my application from computer (filed through Turbo Tax; I am unable to track it. Can you help? Thank you.
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