My broker said - "The adjusted cost basis could be different from the income reported if there was a wash sale incurred.."
Schwab's article explains this - https://www.schwab.com/learn/story/primer-on-wash-sales. Section "Q: How does the wash sale rule work?".
I have previously sold at loss and that loss must have been added to my current cost basis.
In general, I sell immediately after my RSUs vest and I have grants from multiple years that I sell just after every vesting date. It's not clear how they decide on which transaction to adjust because I have multiple transactions on every vest date.
For now i'll just use the Adjusted Cost or Other Basis (z) for tax-filing purpose.
@GeorgeM777 , thanks for spending your time on this.
