Yes, I can explain this.
The amount in box 12 with code J is not taxable income, but that doesn't mean that you subtract it from the amount in box 1 to get your taxable amount.
The instruction for code J is this:
"Code J—Nontaxable sick pay. Show any sick pay that was paid by a third party and was not includible in income (and not shown in boxes 1, 3, and 5) because the employee contributed to the sick pay plan." IRS instructions for W2
So this form is reporting that you received $19,161 in taxable wages and $7,983 in non-taxable third party sick pay. If you think that is not correct, you should contact your employer to get it corrected.
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