Report your foreign dividends, gains, losses, and foreign taxes in the appropriate section of TurboTax, even if you did not receive a tax document. For example, you will report your dividends in the "Interest and Dividends" section. You will report your investment sales in the "Investment Income" section. You can include the foreign taxes paid that pertain to the investment income in the corresponding section as well. The foreign tax information will then flow to Form 1116. Here you will be prompted to answer questions about the foreign taxes you paid.
For additional information, see TurboTaxMargaretL's excellent response to a similar question below.
https://ttlc.intuit.com/replies/5269596
