There’s a specific way to enter your Box 7 foreign tax paid for Form 1099-DIV in TurboTax Online. If you miss it, a tax credit may not appear.
First, go back into the Form 1099-DIV portion of the interview and make sure you entered the Foreign tax paid from Box 7 of Form 1099-DIV, Dividends and Distributions. The entry box is hidden when the relevant page first appears.
Please see the TurboTax Help article Where do I enter my 1099-DIV in TurboTax Online? for entry information.
Note that, when you get to the Let's get the info from your 1099-DIV page, you’ll need to select the My form has info in other boxes (this is uncommon) box. This will generate a Box 7 field for you to enter.
It’s also possible that, at some point, you may have inadvertently selected to claim a deduction, rather than a credit.
If the above doesn’t work, then, in TurboTax Online:
Please see the TurboTax Help article What does or doesn't qualify for the Foreign Tax Credit? for more information.