Do I have to include closing documents, etc on my rental, when I am only renting it out for one year only?

You don't have to, but it may help in the long run. These costs are added to the basis of the property. When you sell, they will help to reduce the gain. Even if you convert it to a personal home, you will have to recapture (pay tax on) the depreciation.

The following items are some of the settlement fees or closing costs you can include in the basis of your property.

Abstract fees (abstract of title fees).

Charges for installing utility services.

Legal fees (including title search and preparation of the sales contract and deed).

Recording fees.

Surveys.

Transfer taxes.

Owner's title insurance.

Any amounts the seller owes that you agree to pay, such as back taxes or interest, recording or mortgage fees, charges for improvements or repairs, and sales commissions.