You have the option to download the program to do your amended return. Download the program, move your .data file. Then you can switch over to forms mode. You will be able to force the deletion of the form and can also override any entries preventing the deletion.
See How do I amend my federal tax return for a prior year? Choose online until you reach select Amend using Desktop and follow those directions.
If you are using a windows computer, you can right click and override a field. You will see delete form in the bottom left when looking at the forms in Forms mode.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"