How to split Federal AGI for Ky Filing Separate

[Creek_Jumper]

We have filed jointly for Federal but will file separate for Kentucky.  That means we have to determine which part of the Federal AGI belongs to each of us.  I was trying to double-check TurboTax and I don't think it's doing it correctly.  Most of our income it's easy to tell whose is whose but what do you do with joint income?  For example, interest or dividends on a jointly-held account.

[DMarkM1]

KY is not a community property state so for a married-couple-owned joint account, the income can be split however you agree as long as all the income is accounted for; typically it is split 50/50.  

In each of your "Mock" federal separate returns each of you enter the forms 1099 information but only your agreed upon share of the income amounts. The amounts will then transfer to your separate state returns.