You don't need to search for the form. When you enter your withdrawal information and answer the COVID questions, it automatically processes the 8915-E form for you. If it had already been entered, delete the entry and re-enter the 1099-R information and you will get the COVID questions. Make sure your TurboTax software version is 2020.r19.040 or later. The current version is now 2020.r21.042.
