I'm getting an error when trying to finish my 1099 nec for my Doordarshan Grubb etc. It keeps saying to fill out Schedule C and I'm not sure what to put there exactly

Your Doordash and GrubHub delivery work is self-employment and self-employment income (and expenses) are reported on Schedule C.   You need to set up one Schedule C for your delivery work.   On that one Schedule C, you will report all of your delivery income and all of the related expenses.   You can have 20 different 1099s, all from different delivery places, that you will report on your Schedule C.    So, create one Schedule C using your personal information (it is your business), instructions are below and after you enter all of your delivery income, you will be taken to the expense section where you can enter your vehicle and other business deductions to lower your taxable income.    

Instructions for entering your Schedule C - if you have questions along the way, you can ask in this forum.    Other links you may find helpful:

• What self-employed expenses can I deduct?
• What is the self-employment tax?
• Why am I paying self-employment tax?
• What tax breaks can I get for my 1099-MISC?
• What's the difference between self-employment income and other income?
• Am I considered self-employed?
• How is being self-employed different from being an employee?

• Self-Employment Taxes Tax Tips

• Industry-Specific Deductions and the TurboTax Self-Employment Tax Center