Follow the below procedure to override income tax in bulk.
From the greytHR admin login >> Navigate to the Employee section
Under the Admin section select the option Excel Import
Select Importer type as "Income tax override"
Download a sample file
Update the Required fields
Remove the other Components which is not applicable
Click on Upload file and attach the spreadsheet
Click Next >> Check the Mappings > Click on Next > Import ( Follow the wizard and complete the task)
Watch the video to know how the bulk data upload works on greytHR