there is no K-1 for a single-member LLC taxed as a sole proprietorship and there can be no partnership return because that requires at least two members/partners. Rental activity would get entered on schedule E while other business activity would be entered on schedule C - there is NO K-1 to report. If Turbotax asks about a K-1, you answered some questions incorrectly for 2023. The fact that it will file as an S-Corp for 2024 is irrelevant for 2023.
for 2024 an S-corp return will need to be filed. The requires Turbotax business which offers on-line assistance or desktop do-it-yourself.
