Did not work for me. The answer you have suggested appears to be for the Tax Pro who invites a Client as indicated implied in your response. As I log in, as a client, I see my 2018 tax forms but do not see the "Edit" nor the "Actions" mentioned in the link you have provided and therefore, I do not see a way for me to delete those files. Here is what the link you have provided re deleting files:
"Question 7. How do I delete requests and documents sent to a client?
Answer. Open the client. In the client view click on the "Edit" located under "Actions" and select the "Delete" option."
In my case, I am the client & would like to delete all my 2018 tax forms that I had uploaded as well as my 2018 Tax return that was uploaded by my Tax pro.