I exercised and sold some Qualified Stock Option Shares (QSOP) in 2025. On my 1099, they are listed in the 1099-B section with the purchase price listed as the cost basis.
I was able to use the supplemental information to use the "Adjusted cost basis" provided by Fidelity, similar to my RSU's where there was NO cost basis reported.
My question is that since the sale is listed in Box 14 of my W-2 and included in my wages, was using the adjusted cost basis in my supplemental information the correct approach? Or is there another value I should be using to avoid these sales being taxed twice?
