Get your taxes done using TurboTax

Change the income type to General Category Income. When you get to the screen where it mentions other Gross income, enter the $70,000 again.  This will not double your income but will apply your credit properly. Your $15,000 for foreign tax paid is recorded properly in your return.

Now, what happens is that you will be given a Foreign Tax Credit of $7666 which is the amount of your US tax liability on your return and the other $7334 will be carried forward for ten years to offset any future foreign income. Your credit is limited by the amount of tax liability assessed on your foreign income. 

Keep in mind, if you add more income to your return, your US tax liability may change thus the credit and carryover amounts may change as well. Your example is not set in stone so to speak. i have included a screenshot below to show where you should enter the $70,000 again.  I know it mentions not to report it if it reported elsewhere but you don't have a 1099 DIV, 2555, 1099 DIV or Schedule K1 so you will need to enter this so that the credit will be applied properly. Here is the screenshot on how to enter this in the foreign tax credit section. Be sure to reach out to me if you have further questions.