No you cannot just add it to next year. That is not allowed. ALL of your 2021 income is supposed to be on the same 2021 Form 1040. You got in a rush and filed too soon instead of waiting for all of your documents.
That is now going to cause a problem for you, But do not make it worse by messing with your return now. You have to wait and fix the problem by amending and sending in a Form 1040X in a couple of months or whenever the IRS finishes processing the return you already e-filed.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
