How do I get to a schedule M on the State of Kentucky return? I need to deduct military pay income.

Under My Info down the left side of the screen, 

 

• Did you select Yes at the question I am a member or former member of the US Armed Forces?  
• Then did you also answer the question What was your military status as of December 31?

When entering your military W-2, did you select Active military duty at the screen Let's check for uncommon situations.?

 

In TurboTax Online, the Kentucky state income tax return automatically added Schedule M.

 

 

See also this Kentucky Department of Revenue website.