(Out of Scope, For Information Purpose)
Some international students and scholars receive income from gambling. This income is not effectively connected with the reason for their visit to the U.S. and must be reported on Schedule NEC, page 4, and not on Form 1040NR, page 1.
Canadian residents may report their net winnings, while residents of all other countries must report their gross winnings. Separate lines on Schedule NEC are provided for computing the tax for these two scenarios.