I have a time share. It only rented part of the time that I wanted to rent it. How do I emter this in the form?

Where do I enter Rental Income and Expenses?   See this link for instructions.   

If you receive rental income for the use of a dwelling unit, such as a house or an apartment, you may deduct certain expenses. These expenses, which may include mortgage interest, real estate taxes, casualty losses, maintenance, utilities, insurance, and depreciation, will reduce the amount of rental income that's subject to tax.

If you rent a dwelling unit to others that you also use as a residence, limitations may apply to the rental expenses you can deduct. You're considered to use a dwelling unit as a residence if you use it for personal purposes during the tax year for a number of days that’s more than the greater of:

1. 14 days, or
2. 10% of the total days you rent it to others at a fair rental price.

It's possible that you'll use more than one dwelling unit as a residence during the year. For example, if you live in your main home for 11 months, your home is a dwelling unit used as a residence. If you live in your vacation home for the other 30 days of the year, your vacation home is also a dwelling unit used as a residence unless you rent your vacation home to others at a fair rental value for 300 or more days during the year in this example.

A day of personal use of a dwelling unit is any day that the unit is used by:

• You or any other person who has an interest in it, unless you rent your interest to another owner as his or her main home and the other owner pays a fair rental price under a shared equity financing agreement
• A member of your family or of a family of any other person who has an interest in it, unless the family member uses it as his or her main home and pays a fair rental price
• Anyone under an agreement that lets you use some other dwelling unit
• Anyone at less than fair rental price

IRS Vacation Rental Info