Get your taxes done using TurboTax

You are not giving us much information but it sounds like you have been working as an independent contractor--perhaps without realizing it or asking questions during the past year as to why no tax was being withheld.

https://ttlc.intuit.com/questions/2584365-am-i-an-employee-or-an-independent-contractor

https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/...

https://ttlc.intuit.com/community/self-employed/help/what-is-the-self-employment-tax/00/25922

https://ttlc.intuit.com/questions/2902389-why-am-i-paying-self-employment-tax

https://ttlc.intuit.com/questions/1901340-where-do-i-enter-schedule-c

https://ttlc.intuit.com/questions/3398950-what-self-employed-expenses-can-i-deduct

https://ttlc.intuit.com/questions/1901110-do-i-need-to-make-estimated-tax-payments-to-the-irs