I just went thru my 2018 returns with one of your agents; I didn't enter any numbers for 2017 , only income for 2018 ; what do I do? can you file an extension?

Here's the direct link to file an extension through TurboTax:

https://myturbotax.intuit.com/eze/

It's fast and free to extend! Turbotax will help you estimate your taxes for 2018. If you owe taxes, we recommend paying the full amount on or before April 15 to avoid/minimize any interest payments. 

It does sound like you should file an extension. If you go to https://turbotax.intuit.com/tax-tips/tax-extensions/what-are-tax-extensions/L5IG9YiQ7 you can get information on the process and use our easy extension process.