It is too late to file a 2013 tax return and still get a refund.
You cannot get the Child Tax Credit, or Earned Income Credit, for 2014. The money you hear about people getting for just filing a tax return claiming kids requires you to have some earned income (wages or self employment). Without earned income, you are not eligible for the "refundable" Earned Income Credit or Additional Child Tax Credit.
If you are a student, over age 23, and are not claimed as a dependent by someone else (e.g. your parent) you may be eligible for the up to $1000 refundable American Opportunity (tuition) Credit. That credit is not dependent on having either kids or earned income. You must be at least a half time undergraduate student and actually paid tuition (not just had it paid by grants). Tuition paid by loans counts as paid by you (since you have to pay that back, someday)
If you worked part of 2015, you can still file a 2015 return. Free TurboTax (TT) software is not available for past years. For how to file see
https://turbotax.intuit.com/personal-taxes/past-years-products/
Which years didn't you file? Should only have been 2014. What about Jan-May 2013 and June - Dec 2015.
How did you support yourself and your family those years?
It is too late to file a 2013 tax return and still get a refund.
You cannot get the Child Tax Credit, or Earned Income Credit, for 2014. The money you hear about people getting for just filing a tax return claiming kids requires you to have some earned income (wages or self employment). Without earned income, you are not eligible for the "refundable" Earned Income Credit or Additional Child Tax Credit.
If you are a student, over age 23, and are not claimed as a dependent by someone else (e.g. your parent) you may be eligible for the up to $1000 refundable American Opportunity (tuition) Credit. That credit is not dependent on having either kids or earned income. You must be at least a half time undergraduate student and actually paid tuition (not just had it paid by grants). Tuition paid by loans counts as paid by you (since you have to pay that back, someday)
If you worked part of 2015, you can still file a 2015 return. Free TurboTax (TT) software is not available for past years. For how to file see
https://turbotax.intuit.com/personal-taxes/past-years-products/