Unless your municipality has undergone a revaluation or reassessment in the last year, the deadline for filing a Tax Appeal is April 1st. Appeals must be received by the County Tax Board or New Jersey Tax Court by this date.
Here is a link to the information bulletin from Monmouth County containing all the information you'll need to get started. http://mls.momls.com/MonmouthReports/ListitLib/show_report.aspx?ID=7454335478
If you need comparable sales for your property, just give me a call at 732-768-1068.