For the 2017 tax year only, several provisions affecting relatively large numbers of individual taxpayers, including the "above-the-line" deduction for certain post-secondary tuition costs (Form 8917), the exclusion from gross income for discharged mortgage debt for a principal residence (Form 982), and the Schedule A itemized deduction for mortgage insurance premiums were retroactively restored. The IRS updated several 2017 tax forms to reflect these extensions on February 23, 2018; taxpayers affected by the change who filed a return before this date can file an amended return (Form 1040X) to claim these tax adjustments.[4] The BBA of 2018 reinstated the nonbusiness energy property credit for 2017, and it reinstated the residential energy efficient property credit for qualified small wind energy property costs, qualified geothermal heat pump property costs, and qualified fuel cell property costs to the end of 2021.