If the total amount of income you earned for 2017 was less than the 2017 standard deduction amount, you were not required to file a tax return, so you do not need to worry about it unless you made more. If you had tax withheld, sorry, you are years too late to receive a refund. You had three years to file and receive a refund, which has now been forfeited.
2017 Standard Deductions
Single $6350 (65 or older + $1550)
Married Filing Separately $6350 (65 or older + $1250)
Married Filing Jointly $12,700 (65 or older + $1250@)
Head of Household $9350 (65 or older + $1550)
(Also + $1600 if blind)
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
