I recently took an early withdrawal from my 401K. 20% was withheld for federal taxes. Is there a way I can prepare for tax season next year and know what else I will owe?

The withdrawal amount is 14,000 and 2,800 was withheld. I am currently in the 25% tax bracket and this withdrawal will not push me to the next bracket. I live in Colorado, so I am wondering what state taxes I will need to anticipate paying next year. thanks!