If the amount showing $0 is tax due, @baldietax is exactly right. Continue on with your return, as there is no tax liability for $68.
If the interest income is showing $0, revisit that section in TTO:
1. Federal > Wages & Income
2. Investment and Savings
3. Interest on 1099-INT
4. Select the entity that paid $68 and be sure the amount is entered in the proper box number in TTO.
Here is some helpful information on taxation of interest.
