IRS sent client 106C letter denying $1800 withholding that is on W-2.  Client sent in backup after earlier letter, but it hasn't resolved.   I'm not confident that was done correctly as I didn't see any information.  Anyway, we have the W-2 and the last paystub that match and according to the letter the next step would be to send in "small dollar case appeal" in writing.  

This has taken forever, is there any quicker way at this time?  If we send this in, any turnaround time experience out there? 

Thanks, Sandy