Unfortunately, at this point you this does apply to any amended returns done at this point. This can be found in section 204 of the PATH act that established this criteria in the first place. Here is the excerpt for the act passed in December 2015. Note that although it exempts timely filed 2015 returns from the requirement of getting the SSN on or before the due date of the return, it doesn't exempt amendments to a 2015 return (or earlier returns) from this law.
PREVENTION OF RETROACTIVE CLAIMS OF EARNED INCOME CREDIT AFTER ISSUANCE OF SOCIAL SECURITY NUMBER. IN GENERAL
Section 32(m) is amended by inserting ‘‘on or before the due date for filing the return for the taxable year’’ before the period at the end.
(b) EFFECTIVE DATE.
IN GENERAL
Except as provided in paragraph (2), the amendment made by this section shall apply to any return of tax, and any amendment or supplement to any return of tax, which is filed after the date of the enactment of this Act.
EXCEPTION FOR TIMELY FILED 2015 RETURNS
The amendment made by this section shall not apply to any return of tax (other than an amendment or supplement to any return of tax) for any taxable year which includes the date of the enactment of this Act if such return is filed on or before the due date for such return of tax.
<a rel="nofollow" target="_blank" href="
http://docs.house.gov/billsthisweek/20151214/121515.250_xml.pdf">http://docs.house.gov/billsthisweek...>
