you must report both. if you don't expect the IRS to contact you. s to filing if there's withholding and your tax bill is zero the only way to get it back is to file. also, states may have a different filing requirement.
https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
these are the 1040 instructions
since you have provided no info about yourself look at pages 9,10 and 11 to see if you need to file.
