Why is my tax refund so low

[MindyB]

There are many reasons that your refund may be lower than you expected.  Some possibilities are starting an additional job or getting a large raise, but not adjusting your W-4. Double check that you have entered in your income and withholding correctly.  A typo would definitely impact this also.

Here is an article with more possible explanations: Why did my refund go down compared to last year's?