To file an extension please start the process here: https://turbotax.intuit.com/irs-tax-extensions/
How am I suppose to add an estimate of payment to the IRS if the taxes have not been started?
Are you expecting a refund or expecting to owe money this year? If you're expecting a refund, then you're set and you can submit the extension with no problem. If you're expecting to owe, you're supposed to pay 90% of the expected liability when you file your extension or risk incurring an additional IRS penalty. To estimate what you owe, you can use a tax calculator such as <a rel="nofollow" target="_blank" href="https://turbotax.intuit.com/tax-tools/calculators/taxcaster/">https://turbotax.intuit.com/tax-tools/calculators/taxcaster/</a> or prepare as much of your return as you can at <a rel="nofollow" target="_blank" href="https://turbotax.intuit.com/">https://turbotax.intuit.com/</a> then calculate 90% of what you expect to owe.