I have a non-resident alien that is selling a personal NYC Condo apt (held as a vacation home) in 2015. He will not have spent anytime in NYC for all of 2015
Besides the IT2663 what forms should he file to report a taxable gain on the sale
He is a British Citizen from Wales UK

If the property was sold for a gain, that gain must be reported on Form 8949 and Schedule D on the federal tax return.