Since you paid for the 2017 Premier online edition you should have been able to download the 2017 amend software and the 2017 tax data file from the online edition at no charge for either.
To access your prior year online tax returns sign onto the TurboTax website with the userID you used to create the account - https://myturbotax.intuit.com/
Scroll down and on the section Your tax returns & documents click on Show. Click on the Year and Click on Amend (change) return and Download .tax file
Contact TurboTax support and speak with an agent again. If they tell you that you have to pay for 2017 Premier desktop edition to amend the 2017 online return, then ask for a supervisor and get the credit card charge reversed.
Post back if Support does not reverse the charge or issue you a refund.
Also the receipt you attached has been removed for your protection. This is a public website.
Support is open from 5am to 9pm Pacific time
To contact TurboTax customer service/support use their contact website during business hours. If the problem concerns any type of refund for fees, use the key words billing issues and do Not use the word Refund or you will get a phone number for tax refunds.
Use this website to contact TurboTax support during business hours - https://support.turbotax.intuit.com/contact/
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
