Last year I worked as an exotic dancer and I do not know how to

You will be able to enter your income as cash income.  Please follow the directions below and remember you can also deduct expenses associated with your profession which includes dancewear, dance classes, shoes, anything you have to purchase to do your job.  To learn more about deductions you can claim, see the IRS Deductible Business Expenses

To enter cash business income in TurboTax,

Go to Federal Taxes > Wages & Income > select I'll choose what I work on 

Scroll down to Business Items > click Start (or Update ) next  Business Income 

Scroll down and click Start or Update next to General Income.  You will be able to enter your cash income on the next page.