Until last year the IRS did not allow an amended return to be e-filed if you were changing the filing status. The IRS has eliminated that restriction, but TurboTax still follows the old rule. So you will have to file your amended return by mail. I forgot about that when I said you could e-file the amended return. It has nothing to do with waiting for the refund from your original return. TurboTax doesn't know when you get your refund.
Your tax return is the form you send to the government that shows your income and calculates your tax. The money the government sends back to you is your refund.
