you could possibly now qualify for the earned income credit. an amended federal return would only be required if you now qualify for it but did not on the original return. with 0 qualifying children, your AGI /earned income would have to be less than $15,820 ($21,710 filing jointly)
in addition:
1) you must have earned income either from wages or from self-employment
2) your investment income would have to be less than $3650
3) can not be married but filing separately
4) can not file form 2555
5) may not be a nonresident alien for any part of the year
6) must be between the ages of 25 and 65
7) can not be another person's dependent
if you have a state income tax see the link for what t do
https://ttlc.intuit.com/community/state-taxes/help/do-i-need-to-amend-my-state-return/01/2134732
