TurboTax Online saves only the most recent version of your tax return. It does not retain previous versions. When you amended your return, the amended version was saved and replaced the original version. If you did not save a copy of the original version on your own computer or phone before you amended it, there is no way to get the original version from TurboTax.
A Tax Return Transcript from the IRS will have the information from your original return, but it is not in the format of the actual forms. A copy of your tax return from the IRS will be the original version. A copy of a tax return costs $43, and it takes up to 75 days to get it. Go to the following link on the IRS web site for information about how to get a transcript or a copy.
Topic no. 156, How to get a transcript or copy of your tax return
On the Form 1040-X in your amended return, column A contains certain figures from your original tax return. It doesn't have all the detail of the original return, but depending on why you need the original, the figures in column A of the 1040-X might meet your needs.