Are you talking about My Docs? That is not your tax return but a place you can store documents. Don't see any steps to delete from there.
What is My Docshttps://ttlc.intuit.com/turbotax-support/en-us/help-article/small-business-processes/docstm/L0VlCWX5...
Access My Docshttps://ttlc.intuit.com/turbotax-support/en-us/help-article/small-business-processes/get-access-docs...
How to upload documents to My Documents, if you have a paid Online versionhttps://ttlc.intuit.com/community/entering-importing/help/how-do-i-upload-documents-to-my-docs/00/26...
