I put in for a deduction for union dues at $2400. But it shows at the end $4800. How can this be corrected?

I only claimed $2400 union dues. Your calculations for my refund is based on $4800 which is not what I claimed. Something like this happened last year and couldn't get it fixed and filed my taxes the old fashion way...the postal service. Looks like I'll being doing it again this year.