How do we fetch the SWT Status from Calc Cards

Summary: We have a requirement where we need to fetch the SWT status on HCM extracts. This column is from Calc cards and we are using a FF to fetch this. The navigation is as below:

My HR/Client Groups -> calculation card-->Search for an employee ->Tax Withholding -> Regional ->State tax (Work location) ->State Tax Information->Exempt from State Income Tax (Y/N) 

Content (please ensure you mask any confidential information): The issue with the FF fetching the CALC card is due to the FF, the extract is causing us Performance issue. As soon as the FF is removed the extract runs smooth with no issue at all. I need to understand if we need to use the Calc Card UE or a better SQL to fetch the SWT status.