<prompt> Human: My parents are a mess. They are horrible at keeping track of paperwork and so they are unable to file an accurate return right now. They do however, have a solid chunk of liquid cash that they would like to make a tax payment with. Last year they owed 20k federal, and 5k state, which they still owe back taxes on I know I know.Heres my plan for them, and tell me if Im forgetting something:1. File an extension for their 2013 taxes2. Have them send in a 2013 federal voucher in the amount of 20k as an estimate including a check for 20k.3. Have them send in a 2013 state voucher in the amount of 5k including a check.Will the IRS accept these vouchers without a return? Is their anything Im forgetting?  <response>: You could actually call the IRS and ask. 