I have a W8 on file when opening my brokerage account, so I received a 1042s instead of 1099. But as a nonresident alien student, I have to pay a flat 30% tax according to IRS. Please tell me how should I file this tax. One of my friends told me I have to manually enter all the trades I've made last year, but that's almost 600 trades. I'm so desperate now. Please do tell me what should I do now.
