Secion 179 Taxable income limit

Hi All,

I have a section 179 carryover 0f $2000 from 2017. The system carried this over to the 2018 forms. However, when I run a final check on my forms section 179 error comes up: "The total Section 179 deduction entered on your tax return is currently greater than the amount allowed to you, based on a Section 179 taxable income limit we have calculated. You must reduce your total Section 179 deduction so that it matches the taxable income limit." What/how is a Section 179 "income limit"