There are too many variables such as the
type of income, your exemptions, filing status, credits, withholding etc., to
answer your question.
I suggest you lay last
year's return next to this year's and do a line by line comparison to see
what's changed. Other wise you haven't provided enough info for anyone to
answer your question. In the on-line version of TurboTax,
the main Form 1040, 1040A or 1040EZ can be seen through Tools, View
Tax Summary, Preview My 1040 or go to Print Center and then
choose to Preview.
It depends on many variables:
the biggest are
1) how big your AGI is
2) filing status
3) how many dependents you have.
4) what deductions and credits to you qualify for
5) withholdings
See this TT FAQ: https://ttlc.intuit.com/questions/1901008-why-did-my-refund-go-down-from-last-year
