You can use the delete data screen to delete all or selected data from Tally. Please note, deleted data cannot be recovered. You should use this screen with caution. Access this by going to Settings > Delete Data. Using the tickboxes, select what you would like to delete. Confirm that you want to delete by typing in the word 'delete' in the tickbox and click the Delete Data button. The selected information will be instantly deleted and is no longer in your Tally account.