Just trying to figure out why my tax’s less this the then it was last year

It depends. 

• Were you eligible for a tax credit last year that didn't apply this year
• Did you have another source of income this year which wasn't there last year?
• Did you change your job or withholdings?
• Did you have higher deductions last year than this year? 

I would recommend reviewing items you had input into your return last year to ensure you are not missing a deduction that you had reported in the past but may not have entered into your return this year.

And the IRS changed the withholding tables so you got more in your checks during the year instead of a big refund.  Or there are other tax changes.  And any  dependents you have are a year older.  If you made more income that can reduce some credits you got like the EIC.