I don't think the state of Texas allows you to file separately if you are married. Not 100% sure, but I think I'm right. So yes, jointly. But I've only been married through one tax season
The state of Texas has absolutely nothing to do with filing your federal taxes. If married, you can choose to file separately or jointly.
You can still file separately, but the amount that you paid with the joint 4868 can only be applied in full on one return. Edit: You can split it, but the sum of the two has to equal the original amount paid and that both SS#'s are on each return so that it can be tracked back.
If you were married on the December 31st of the tax year your only choices are "married filing joint" or "married filing sepatate". "Single" is not an option.
Oh, I know that. I just didn't know if you'd already filed an extension jointly whether or not you could file the returns separately. She's probably going to owe and she already owes me a bunch of money, so I don't want to add on to that.