In attempting to amend my return my original return has been altered on my desktop. Can I retrieve my original filed return.

You need to save the original tax return before amending.   Then save amended return with a unique name.

In the File menu on the top left of the desktop program screen click on Save As... to give the return a unique name.

See this TurboTax support FAQ for how to cancel an amended return when using the TurboTax desktop editions - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/cancel-undo-amended-return-turbotax-cd-download/L7glUWakU_US_en_US?uid=lv8ji8xj

I followed the instructions and recreated my original return by eliminating the 1040x and restoring my original deductions, now when I try to amend this corrected return no 1040x is created and the refund calculator stay at my original numbers.