The Jackson Hewitt website has a tax calculator (under Resources, at the very bottom of their website). I've used it to play around with my 2016 numbers (just to check).
https://www.jacksonhewitt.com/Resource-Center/Tax-Calculator/
It doesn't appear to be up to date though (tax tables seem to be for 2015).
It's too bad the tax tables aren't updated, I just tried this one and it says I should owe $10,584 in federal taxes. My withholding was $10,583.94. Estimating within six cents would surely get me some kind of award. ;-)
Ha ha, that's pretty good. I ended up overpaying my estimated taxes in 2016 (I should have used their tool last year!). And I should have read the GoCurryCracker posts pinned above (tax rate on ordinary dividends and capital gains when you're in the 15% tax bracket = 0% : I had no idea....). Oh well, I can't wait to do taxes this year as I'll be getting that money back!