How do I calculate the insurance and mortgage interest we paid on our home for the portion of the year where we rented it out?

In order to assist you properly, can you tell us which version of TurboTax you are using; Online or Desktop?

We will need more details about your question. If you are an employee receiving a T4, you must declare these expenses in the Employment Expenses section and you will have a place to enter the information about the space you are using for work. The calculation will be done automatically by software related to the percentage of the space used for work.

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