Unfortunately, without access to your tax return, it is impossible to say for certain.
However, there have been significant changes to the tax laws that are impacting the tax refunds of many tax payers.
Included in the changes are the elimination of personal exemptions, changes in the qualifications for tax credits and reductions of tax deductions.
At the same time, the IRS altered its withholding table for employers. In the past, tax withholding tried to create refunds, now they are more closely matched to taxes due.
For more information about all the ways the tax law changes are impacting tax refunds, follow this link:
How
Will Tax Reform Affect My 2018 Taxes