This has been frustrating me as well. If I pick the "by days" method, the IT-203-B TurboTax is generating for me has my whole year income on it and I can't edit it without applying an override. From the IT-203-B instructions they clearly say to only include income from NY sources received as a non-resident, and if you moved to NY later in the year, to not include the resident amount on the form too.
If I pick the "by percent" method, there is no IT-203-B generated, and the instructions from IT-203 clearly say an IT-203-B is required to be filed if applicable.
I suspect I'll either have to apply the override or go with the "by percent" approach. Either way I'll probably have to print out my return and file by mail adding the additional IT-203-B that TurboTax won't generate.
