Your question is unclear, so please clarify... either you never received a 1099INT or did you already enter it in TurboTax and its not listed under Form?
1099INT are forms your investment firm is responsible for providing to you. They may send it to you via paper mail (depending on how your investment account is setup), but they are always listed within your online account access. So setup online account access to your investment firm and check under the statements or tax documents portion of website. You should be able to download it there.
The other option is that Turbo Tax will automatically import this information if you give Turbo Tax your user name and password to your financial firms online account access. It is a much better way of getting all those financial transactions input without error.
