Why do I owe so much money this year?

[CarolynM]

There were significant changes to the tax laws this year.

The personal exemptions were eliminated, itemized deduction were reduced or eliminated and the educational credits completely revised.

Further, the IRS changed their withholding tables to more closely reflect taxes due, rather than to create refunds.

For more information about the impact of the new tax laws, follow this link: How Will Tax Reform Affect My 2018 Taxes