Your unamortized costs can be expensed in your final year.
However, if you dissolved the LLC in February of 2024 your return is late.
The final return should have been filed by the 15th day of the third month after it was dissolved. That would make the due date May 15th, 2024.
You may receive a late filing notice from the IRS, so just be prepared.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.