It is still available but you have to disable the AI in the Search function. Click on File in the upper left of the desktop program screen. Click on Signed in as (your user id). The click on Sign out on both windows. Then use the Search function again, but do not sign back onto your account.
OR -
Click on Federal Taxes (Personal using Home & Business)
Click on Other Tax Situations
Under Other Tax Forms
On Form W-4 and estimated taxes, click on the start or update button