Before starting to amend the tax return, wait for the tax refund to be received or the taxes due to be paid and processed by the IRS.
See this TurboTax support FAQ for amending a current year tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-current-year/L7eS6o1qh_US_en_US?uid=lfunevhk
You will need to file an amended return to report this form 1099-INT.
As you have already filed, please wait to see if your return is accepted or rejected. If rejected, you may correct and resubmit. If it is accepted, you need to file an amended return.
If you are expecting a refund, we recommend that you wait to amend until after the IRS has processed your original return and you have received your refund.
To amend your tax return, please read this TurboTax article.