Using the Home & Business program (which it appears you are using), will generate Schedule SE once you enter all your information. If you have self-employment income, TurboTax will automatically prepare the form and calculate the taxes owed.
If you continue with self-employment income for this year, you definitely should be making estimated tax payments quarterly to the IRS. See the information below for more:
https://ttlc.intuit.com/questions/1901110-do-i-need-to-make-estimated-tax-payments-to-the-irs
https://ttlc.intuit.com/questions/1900810-what-are-estimated-taxes
https://ttlc.intuit.com/questions/1899662-form-1040-es-estimated-tax-for-individuals
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
