I received the second W2 because there was an overflow on Box 12 (i.e. there are 5 items there and only 4 lines). TurboTax also only provides 4 lines, so I don'...
I did have a loss in 2019 of -$839 that shows up on line 4 of form 8582. However, none of this should matter because of the tax treaty between US and Canada, co...