setup a second account

Are you trying to start another return in TurboTax Online? If so, please see the below TurboTax help article for assistance. 

How do I start another return in TurboTax Online?

link does not answer the question nor provide steps to setup a second account

Can you clarify what you are trying to add?  Are you trying to setup a different TurboTax account?  If so, you will setup a different account using a different email.  Go to TurboTax.com and select create an account.

@mland 

The information says I can setup up to 5 returns under one email.  I am trying to add an account for my deceased mother to file her last return.

To start a new return in TurboTax desktop follow these steps:

1. Open TurboTax
2. Click File in the upper left corner
3. Click Start New Return
4. Click the type of return you are trying to file (see screenshots below)

@mland 

how do I do this in Turbotax online?

To create a new account for TurboTax Online, go to the main page and click on the Sign up button. You can create a new account using the same email address or a new email address.