How do i find and enter my husbands Roth information and 401k?

The contributions for the 401(k) are listed on the W-2 box 12 and all you need to do is enter the W-2.

 

If he made Roth IRA contributions (outside of work) then you will enter them in the IRA contribution section:

 

1. Login to your TurboTax Account 
2. Click on "Search" on the top right and type “IRA contributions” 
3. Click on “Jump to IRA contributions"
4. Select "Roth IRA"