My two cents.
Yes, you are so over-analysing. :-) Where you got tied up is in the meanings of various words. The words "domicile" and "resident" mean slightly different things in different places
I know that they aren't supposed to be the same thing. However, I saw a few pages in the NYS tax website where domicile and residency were used interchangeably - I guess to "simplify" things for the reader? Hence my confusion.
OK, looking at the link supplied by Guya, it seems you can be domiciled but non-resident according to the NYS definition.
"If your domicile is New York State, you are generally considered a
resident of New York State. However, even if your domicile is
New York State, you are not a resident if you meet all three conditions
in either Group A or Group B as follows:
Group A
(1) you did not maintain any permanent place of abode in
New York State during the tax year; and
(2) you maintained a permanent place of abode outside
New York State during the entire tax year; and
(3) you spent 30 days or less (a part of a day is a day for this
purpose) in New York State during the tax year.
Group B
(1) you were in a foreign country for at least 450 days during any
period of 548 consecutive days; and
(2) you spent 90 days or less (a part of a day is a day for this
purpose) in New York State during this 548-day period, and
your spouse (unless legally separated) or minor children spent 90
days or less in New York State during this 548-day period in a
permanent place of abode maintained by you; and
(3) during the nonresident portion of the tax year in which the
548-day period begins, and during the nonresident portion of the
tax year in which the 548-day period ends, you were present in
New York State for no more than the number of days that bears
the same ratio to 90 as the number of days in such portion of the
tax year bears to 548. The following formula illustrates this
condition:
number of days in the maximum days
nonresident portion x 90 = allowed in
548 New York State"
Which means that I can declare a NY state domicile but still be non-resident, so I don't have to pay NYS taxes.
Thanks Guya and Lizzit.
P.S. Guya, are you saying that to claim a NYS domicile, I have to file the non-resident form every year, even though I have $0 NYS income? I didn't file any NYS taxes for 2006 as I was resident in the UK the whole year.