To delete a person you will need to first click on the people tab.
Then click on the person you wish to delete. Inside their record, click on the trashcan icon.
You will be prompted to make sure you wish to delete them permanatly.
Another way to delete people is to do so by multiselecting. By clicking on the multiselect option at the top, it will allow you to select multiple people to add to a group or delete from your account. Click on each record and the blue checkmark will appear in their record. Then select at the top which function you want to do for those records. Deleting a record, removes them completely from your Text in Church account.