It should really be this simple: Government says you owe $X based calculations that it shows. You validate, correct the mistakes (e.g. inaccurate $0 basis is

It should really be this simple: Government says you owe $X based calculations that it shows. You validate, correct the mistakes (e.g. inaccurate $0 basis is a common problem for RSU reporting) and have a generous time to amend the corrections. If you don't correct or can'd find anything to correct, then there's no work on your side (which would be the case for millions of people).