Add a state option not there. printed 2021 return, did not file, need to open and revise, was told to add a state to get back in, add a state option not there? help

I printed the 2021 return, but did not file, thought it was filed, but lost in mail.  Good news is, I need to revise it.  I was told to add a state from my documents on 2021.  This is not an option, add a state is not there.  How do I open the 2021 file to revise this.  Help