The points paid in 2015 must be used on that return. You can prepare an amended return for 2015 by using the information below. As example in the 15% tax bracket this would mean $119 reduction in tax and refund.
The IRS does not allow the e-file of an amended return so the link here will provide the mailing address for your area: Where
to File Paper Returns With or Without a Payment
https://ttlc.intuit.com/replies/3288565
Usually if a federal return is amended, it's likely the state return will need to be amended. Not all states do have or include itemized deductions. To find the information and to obtain the mailing address for your area, select your state below.
https://ttlc.intuit.com/replies/3302452
