Sir, after submitting the tds return for first with nil tax paid i got message?

Sir, I have uploaded tds of employee where the total tax of all employee is Nil.So no challan no tax. I got message challan / pan error has been identified in the statement filed by you.correct the error online within 7days to avoid potential defaults of short payment /pan error. I want to know no payment paid by me,and i have check the pan also.alright now what to do?