Im a tv tech answering the phone and seting up service calls acording to tech ability. also i am sewing machine tech for a industrial garment factory How do i do that

You may need to clarify your question.  Are you asking about how to enter income or how to enter a job title? 

For the job title use the one that takes the most of your work time. 

For your income sources you should get a W2 from any employers and you will enter that form information exactly as it appears on your form into TurboTax.

If you are self-employed you may get a 1099-NEC which you will enter in the self-employed topic.  If not you will just enter your total cash receipts in the self-employed topic.

Both of the income entries are under the "Wages & Income" tab.