I just accepted a new position and was told for the first three months no taxes would be taken from my paycheck.

1. Why would a company choose to do this during the "trial period?"
2. I think I am supposed to put aside an amount (based on my tax bracket) that would normally be withheld because I may owe this when I file my taxes next year, correct?
And 3. Should I be worried?

1) I can think of no reason.

2) Yes, as YOU are responsible for paying the taxes.

3) Do not know!