Non-taxable sick pay is not subject to taxation because the employee contributed completely to the sick pay plan. It does not need to be reported on your income taxes (and is not shown in boxes 1, 3, and 5 of the W-2). Your employer was required to generate a W2 with the figure, which is why you received it. So basically you do not need to file this return, per IRS.
[Edited 1/16/18 | 10:24]
