The clock is ticking for you to file your taxes. To avoid a late filing penalty, taxes must be mailed with an April 15th postmark. Several states have post offices that will stay open late to help procrastinators get their taxes in on time. There are also several ways to file taxes online. Another option is filing for an extension which gives you until October to get your taxes in, but there will be penalties if you dont pay whatever you owe by April 15th. In addition, filing a 2007 tax return is necessary to get a tax rebate check from the economic stimulus program.