"My grand total in adjustments is about $1400 less than the total income reported in Box 12a Code V on the W2. Shouldn't they match? I will go back and double check all my numbers to make sure I didn't type something in wrong."
If all the exercises took place in 2019 then I'd expect that the compensation figures would match. But if you exercised in 2018 or 2020 that could be the reason for the difference. It's the exercise, not the sale, that creates the compensation.
Or, of course, you might have made an error somewhere along the way. Most same day sales (exercise/sale occurring simultaneously) result in a small loss due to selling commissions and fees, so I'd scan for any sales that had large gains or large losses and investigate those first.
