First back up the file!

Go to the input and use CTRL+W to enter batch mode.  Scroll down the left hand column to find 59 - 1040X. Click on the 1st line of code/Amount/Description and start using CTRL+D to delete those lines that are there. 

Use CTRL+W to go back to batch input. You may want to go to Screen 47 and add an "Letter Misc 1" opening paragraph about this being a corrective filing.

Does this really need to be corrected? Is there any change in tax? IRS pulls form SS records and if the clients have not been contacted, I sure wouldn't muddy the waters with any hand written new form.