Yes
, you
will need to file a nonresident state
return to report your gambling winnings from Idaho on Form W-2G. There is no exemption for gambling winnings in Idaho.
When preparing returns in multiple states, it's
best to do your nonresident (Idaho) and/or part-year resident
state returns first, and your resident (Washington) state
last. So, that the credit for the nonresident state taxes paid is accurately
calculated on your resident state tax return.
For more information about Idaho laws click here.
Please see FAQ, and complete the steps to report
your winnings/losses on Form W-2G: https://ttlc.intuit.com/replies/5122514