I need to edit my 2106, as I made some mistakes when I was correcting the return at the end of my federal return processing. How do I edit it?

I started manually editing the document at the end of the federal tax reconciliation, but made a couple of mistakes while I was doing it.  There's no way to back up during that process, and the options/questions during the deductions process doesn't cover any of the questions that are actually on the form 2106.  How do I get back to the 2106 to fix my mistakes?