OK, this might be helpful to others. I contacted Turbo tax technical support and we worked through a few things in trying to understand the screens. As it turns out, GA handles interest, dividends and other income in a manner that depends on whether earned by yourself, spouse or jointly. NJ takes each source and splits between states irrespective of ownership. The subtle clue in the GA panels was the name of each person is within the intro paragraph. So for example, you jointly have $1200 of total interest income comprised of $800 that is yours and $400 that is your spouses and say 75% was paid by each to the Other State. Under the screen for your self, you'd enter $600 and when you hit Continue and come back, GA should show $200. Then when you go to your spouse's screen, you'd enter $300 as paid to Other State and when you hit Continue and come back, her GA should show $100. The key to this working correctly is way back in the Federal entries where you designate ownership of the interest, dividend and other income as being yourself, your spouse or jointly. Some things like Other Income appear to be allocated to only one spouse or the other and not joint. One of the brick walls I kept hitting was that for myself, the total of GA and Other State never added up to being the actual total interest because TT was only allowing allocation of about half the amount to me and the other was to my spouse, whose screen I kept blowing past thinking it was the navigation circling back to the first screen again. Once I verified source ownership and then properly allocated each owners share between states, everything seems to total out correctly.
