I lived in Kansas and Missouri throughout 2019. Do I tax the full gross amount of my earnings on both of the states’ filing?

[KrisD15]

If you are claiming residency for BOTH states, you would enter your full income on both state returns. 

Almost always a taxpayer would claim full or part-year resident for one state and part-year or non-resident for the other. 

Kansas considers a taxpayer as part year if the person was in the state less than 12 months, so sounds like you would be part-year for Kansas, but then you would need to allocate the income between the two states. That is something you, not the TurboTax program, must do.