consulting question

I am doing consulting work  through a consulting company. I do not own the consulting company.   I  get paid and get a 1099 NEC tax form.  I get to choose when I work and what studies I will work on. Do I get a Qualified Business Income Deduction.  Turbo tax said I do not qualify.   Why would I not get QBI Would QBI deduction reduce consulting income by 20% that I have to pay taxes on ??