Actually, starting this year, by law, the company you work for has to support electronically picking up your tax bracket directly from the government. Citizens no longer need to to worry about their tax card, however you can still inspect it online.
I would also say that most people don't have to make any changes to your filings, it's more relevant checking the information that goes into your tax-card, especially if you expect a change of income or debts as it effects your tax rate/bracket.
Furthermore, you are no longer required to (digitally) sign your tax returns. If you make no change or objection it is assumed that you're happy with them.