I filed with TurboTax and owe bigtime. When will the balance reflect on the IRS site? Why can't I apply for a 180 day extension yet?

I took an age 59 1/2 withdrawal from my TSP and IRS held back 20%. It should have been more like 29%. I owe over $62,000 in taxes. We used the withdrawal to buy a new house and are currently selling the old house. I know we will have it sold in under a half year and just need an extension. I went onto the IRS site. My owed taxes still don't show after filing 12 days ago. Is this normal? When will the system allow me to request an extension? Can I do it all through the IRS online site, or do I need to call? If anyone has any info I'd appreciate it.