Tax season is here again, and this is the first under the Republican-championed Tax Cuts & Jobs Act. Some people (and businesses) are seeing a reduction in taxes owed, but others are shocked to find out they owe for the first time.

What could the impact to your tax bill be? The Tax Foundation is out with a new tool that will show you exactly what you’d owe under the new system- and the old one. Curious about how a single parent with two kids making $52,000 a year would fare? They’ve included plenty of example cases for you to examine.

The tool is very detailed, so you can even enter individual deductions should you choose to. Check it out below: