You can claim HRA by submitting Rent receipts. Besides you can claim Home Loan repayment benefit provided you show the house has been let out for rent and the rent as your additional income. You have to declare the annual lettable value and the maintenece cost, taxes paid. If the Interest and cost of Maintenance and taxes are higher than the rent earning, you may claim the difference as Loss from house property. You need to fill the form 12C in any case which gives all the details.