Line 9 is the "Qualified Business Income (QBI) deduction". This new deduction applies to Schedule C filers (sole proprietorships and other self-employed businesses), LLCs, partnerships, S corporations, estates, and trusts. If you had any type of this income TurboTax automatically this calculates this deduction. Please see this FAQ for more information:
https://ttlc.intuit.com/replies/7019998
