Yes. You can disregard the Form 9465 and pay now.
You can submit a check to the Internal Revenue Service (IRS) Campus located in your state. You must include the year, type of tax (Form 1040), and your Social Security Number on the front of the check.
You can also pay on-line, in person, or by phone. I have included a link that provides the various pay methods you can utilize to pay your outstanding tax liability: IRS Payment Methods