I heard that I will get a K-1 and I should declare this as a passive income
Yes, when you receive your K-1, enter it into TurboTax and TurboTax will put the income where it should go. You may want to file an extension if you do not receive it before the deadline of April 18, 2023.
To enter your K-1, follow the instructions below for TurboTax Online.
For additional information, please refer to the TurboTax Help article Where do I enter a Schedule K-1 that I received? If you need to file an extension, please review the TurboTax Help article How do I file an IRS extension (Form 4868)?