That should not make a difference for federal. When you tried it in box 1 did you delete it from box 3 (and visa versa)? The only way to tell what changed is to look at the return before you entered the interest and then after entering it in box 1 and again after entering it in box 3. Compare all the 1040 lines.
Are you using the Online version? Before filing you can preview the 1040 or print the whole return. You have to pay any fees first before you can see all the forms, etc.
https://ttlc.intuit.com/community/accessing/help/how-do-i-preview-my-turbotax-online-return-before-f...
