How to enter Part 2 information in Form 4797

I made a Mark-to-Market election and have some losses I need to enter into TurboTax on Form 4797 Part 2 Line 10.   I can open Form 4797 but it is not allowing me to enter any information on Part 2 Line 10.   There is a separate Enterable 4797 (Securities) form which is available but that only starts from Part 3.

 

Could you please help.