since there was no LLC/S-corp election for 2023, that income cannot be reported on as S-Corp return for 2023. Schedule C for 2023 would seem to be the appropriate form. For 2024 there may be some wiggle room because there are provisions for allowing S-Corp status even if the election is filed late but we don't know what you requested as an effective date, whether the election was filed late or if you have reasonable cause if filing late (Question I in the 2553 - also read the info on the back of the form especially part IV. There was also entity classification form 8832 that should have been filed.
if you don't qualify, then income prior to the effective date of the S-Corp election would be reported on schedule C and the S-corp for the rest of the year. You may want to confer with a tax pro to get educated about S-Corps and to see if you qualify for late election relief if you want it. Also, they can inform you about the requirement to take a salary and file payroll tax returns. Other tax returns may also be required. Some states may treat you as an employee and thus require the "S-Corp" to have workmen's compensation insurance, others may treat the LLC as a non-corporate entity and thus not an employee for WC insurance purposes