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Thank you. 

 

Regarding point #7 and #8: what will IRS check the records against if those fields are empty on 1099B? Is that a fault on the brokerage's document?

 

Regarding point #8, the stocks are automatically deducted from my payroll, it's very difficult to go one by one and find the cost of each one. What if I enter an approximate value? How will IRS verify that?