I started a new job a month ago and somehow my federal tax was not set up therefore federal tax was not taken out from my paychecks (2 pay periods). I made sure fed tax is set up now so taxes will be taken out from now on. Do I have to worry about this 2 pay periods missing federal taxes? Or, can I ignore this and owe some amount and pay next year when I file the taxes? *assuming that there is no penalty or interest*