Congress has passed the largest piece of tax reform legislation in more than three decades. The bill will affect the taxes of most taxpayers, but one key point to keep in mind is that for most people, the bill won't affect your taxes for 2017 (the one you file in 2018).
Lower Tax Rates and Changed Income Ranges
The bill retains the seven tax brackets found in current law, but lowers a number of the tax rates. It also changes the income thresholds at which the rates apply.
The current brackets are: 10%, 15%, 25%, 28%, 33%, 35% and 39.6%
The new brackets will be: 10%, 12%, 22%, 24%, 32%, 35% and 37%
Full article here: https://turbotax.intuit.com/tax-tips/irs-tax-return/2017-tax-reform-legislation-what-you-should-know/