Have you filed your tax return? April 15 is fast approaching.
More information regarding Federal tax software and FFA options are describe in the earlier Post. (http://fstax.blogspot.com/2010/01/prepare-print-e-file-your-federal-taxes.html)
If you are not sure, that you are able to file your taxes before that, you can also file an extension (Form 4868) to the IRS to informing about the delay of your tax return. In that case you are not liable for penalty. Most of the software are also supporting the e-file of extension.
Also if you owe money then you have to pay your owe money with this form either by cheques or by direct debit. If you are e-filing then you have a option of direct debit else if you are sending this form as a paper file you need to attach a cheques along with the form. You can find more information about extension filing on http://www.irs.gov