You don't lie on your tax return. That's not how it works. You do your best, guilty until proven innocent. If they come after you then your job is to continue to do your best to comply. Of course all of this is rubbish because it is way harder to prove a negative than a positive, so no matter what the odds are against you.

e.g., "I did not commit the crime") can be more difficult than proving a positive (e.g., "I have an alibi"). This is because a negative assertion often requires providing evidence that something did not happen, which can be inherently more complex than demonstrating that something did happen.