It is part of the questions asked in the Property Profile section of your Rental Income and Expenses part of your return.
The question about personal use days comes up when you see the question asking if the property was rented all year. If you answer 'no', then there are follow-up boxes to enter the number of days rented and the number of days of personal use.
**Say "Thanks" by clicking the thumb icon in a post**Mark the post that answers your question by clicking on "Mark as Best Answer"