My pension is not from Kansas sources, therefore not taxable in this state. How do I choose "not from Kansas Sources?

[DawnC]

Can you enter a zero in that field?   Usually those screens are asking for an amount to allocate where some boxes will be a percentage of the total or the full amount or 0.     See the link below for help with allocating unearned income.   

In general, taxable income for part-year residents includes earnings received while a resident of that state, as well as income from tangible property (property that can be physically touched, such as buildings, cars, computers, or furniture) located in the state.

Income from intangible property (such as interest income, dividends, and pensions) is generally reported to the state you were living in when you received the income.

How do I allocate (split) income for a part-year state return?

[dmertz]

As DawnC said, your pension is taxable in state of which you were a resident at the time of the distribution.  It doesn't matter where the company providing the pension is based.