Three Tax Moves to Make Before the End of the Year

The 1040 Individual Income Tax forms are seen in New York on March 18, 2013. Shannon Stapleton/Reuters

CHICAGO—Think you are getting a big refund in April when you file the first tax return under the changes in the Tax Cuts & Jobs Act?

You better do the math now so you are not surprised by a bill because beyond the much-heralded tax cuts, the new law entails complications that may change your situation in ways you did not expect.