"The 2021 originally filed f1040 included the $67,000 as part of wages."

But it's not part of 2021 W2 compensation. It's the sale, not the award. You state "as part of wages" but you also mentioned earlier that you had done this yourself, and it was not presented as such on the W2. That means they knew it was not 2021 compensation. You keep stating: "not on 2021 W-2 as this is an overseas job/foreign employer." But it's not because they are foreign. A foreign employer still has US reporting requirements. Of course it would not be reported when it doesn't apply to that year.

For your a) and b), you should be using the W2 info as issued. You don't make a supplemental entry as if you know better than what the employer reported. The W2 = Award is basis. The selling is the 1099-B event.

It seems you need to confirm the 2017, 2018, 2019, 2020 and 2021 W2 per the employer. You will also want to know what this was held as, if that was the investment instrument (shares or RSU), then that would explain the change to deposited amounts but not new W2 data for those three deposits that total $37,000.

The release of escrow is not a taxable event, when that value was already reported as taxable compensation. That's why I describe it as part of Banking, not W2 or 1099-B.