How do I get started with TurboTax for self employed for 2018? My 2017 filing is complete with W-2s only but I want to start tracking 2018 income and expenses.

You can start tracking your 2018 business income and expenses in QuickBooks Self-Employed.  And, by utilizing this product, you are able to then transfer your business income and expense information at the end of the year to TurboTax Self-Employed to create and complete your 2018 tax return.

https://quickbooks.intuit.com/self-employed/