Where do I put in a W4 I don’t see an option to add one

You do not enter a W-4 as part of your tax return.  That is the form that you turn in to your employer to change your tax withholding.

If you are asking about entering a W-2, use these steps:

• On the top row of the TurboTax online screen, click on Search (or for CD/downloaded TurboTax locate the search box in the upper right corner)
• This opens a box where you can type in “W-2” (be sure to enter exactly as shown here) and click the magnifying glass (or for CD/downloaded TurboTax, click Find)
• The search results will give you an option to “Jump to early W-2”
• Click on the blue “Jump to W-2” link

Or, if you are asking how to create and print a new W-4 for your employer, then use these steps to get started:

• On the top row of the TurboTax online screen, click on Search (or for CD/downloaded TurboTax locate the search box in the upper right corner)
• This opens a box where you can type in “W-4” (be sure to enter exactly as shown here) and click the magnifying glass (or for CD/downloaded TurboTax, click Find)
• The search results will give you an option to “Jump to early W-4”
• Click on the blue “Jump to W-4” link