I put in a 1099int from First community credit union in twice. How do I delete one of them?

You can [Edit] or add the 1099-INT by following these steps.

Under Federal

1. Select Wages & Income
2. Scroll to Investments and Savings (1099-B, 1099-INT, 1099-DIV, 1099-K, Crypto)
3. Click Add/Edit
4. You will see previously entered 1099s
5. Select the duplicate 1099-INT
6. Use the Trash Can to delete it