Get your taxes done using TurboTax

Sorry but we do not/cannot answer questions about sales tax here in the TurboTax forum.  Ask your state about that

https://ttlc.intuit.com/questions/1901670-how-do-i-contact-my-state-department-of-revenue

You do not have to have "registered" business to have self-employment income.  You report your self-employment income on your tax return along with any other income you received,  And you will need to prepare a Schedule C for your business expenses.  You will pay self-employment tax for Social Security and Medicare.

https://ttlc.intuit.com/questions/2926899-how-does-my-side-job-affect-my-taxes

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/1901110-do-i-need-to-make-estimated-tax-payments-to-the-irs

https://ttlc.intuit.com/questions/2903027-how-do-i-report-income-from-self-employment

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