Is there a way to mass upload Bills of Operations and individual manufacturing steps?

@kandybeatty49 is correct to start with that import based on a properly structured excel. If you need to add materials, steps, etc. to a specific Operation after the BOMs and Operations have been created, you can target the specific Operation before adding to it. Example below is targeting the Operation and then adding Materials to it (Note the <Line Number> row is inactive). I would typically load BOMs in different Imports. Start by creating the BOM and all it’s Operations. Then target the Operations to add Material, then Steps, then Overhead and so on.