Right, neither will work as both are excel worksheets and not EFW2 files.
From within the Excel worksheet, you need to create a file to submit. This is a step after you get and see your QB data.
Resolution for 'Carolina issue: 'Cannot upload W2 file to South Carolina portal.' available: Yes.
The Carolina issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the Carolina issue yourself by looking for a resolution described in the article. If it is a complex Carolina issue or you are unable to solve the issue, you may contact us by clicking here or by using other Carolina support options.
For more information about resolving issues related to Carolina in Quickbooks/QBO or to get support for the issue 'Cannot upload W2 file to South Carolina portal.', click the link below: