@jigo "their software uses the midpoint of the oldest and newest lot for holding period adjustment in the case where multiple lots are sold in a single order and trigger a wash. I suppose this is okay too?"
I don't have any information to confirm or deny this, but I'm skeptical. As an example, On Mar 10 you sell 1 share that's 10 years old, and 99,999 shares that are 2 days old. On Mar 20, you buy back 100,000 shares, triggering a wash sale on both lots. They'd use the midpoint (5 years) as the new holding period for those 100,000 shares? That makes no sense, so unless there's an IRS provision somewhere that says OK, I'd suggest keeping your own records (your broker isn't penalized for providing a 1099 that's not accurate, and you're on the hook for any tax errors).
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**Note also, I'm not a Tax Preparer/CPA. Just a volunteer, seasoned, TurboTax user.
Use any advice accordingly!
