I accidentally selected both deluxe and plus version when I only want turbo tax plus to try and access my 2017 return. How can I get rid of the deluxe on my file ready to purchase?

[Sharmaine]

If you have already registered or paid your online fees, then you cannot downgrade. You will need to speak with an agent. This FAQ will provide you the steps to contact an agent. 
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number

Please follow these steps to downgrade, if you have not paid yet. 
https://ttlc.intuit.com/replies/3288495