Any income received for a rental would be considered a business. When you say 2nd home, if you mean it also has personal use, this is still true.
Form 1099-NEC is for income received as an independent contractor or self-employed entity and Form 1099-MISC is for income that will not be subject to self-employment tax, that is correct.
When a 2nd home has personal and rental use, the rental portion is reported in a separate section if it was rented for more than 14 days. The corresponding percentage of the home expenses can be deducted here.
To do this in TurboTax, in the search box, enter rentals and click the Jump to link.
For more information, see: Does a 1099-NEC or 1099-MISC mean I'm self-employed?
Where do I enter income and expenses from a rental property?
