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Task

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In the below example, the "Test File" document was modified. 

Navigate to the Documents folder under the OneDrive.
Find the file named Test File.docx

Click the 3 dots (...) next to the file name, or right-click the file.
Then select Version history

A list of saved versions will appear, showing the date and time each version was saved.
Find the version you want to restore.

Click Restore next to that version.
The file will be rolled back to that version. The current version will be saved in case you need it later

Once restored, the file is available right away in OneDrive (web or synced folder).