create Shipment and buy label give errors

can we required amount for buy labels (Integrate label API for development purpose) and also getting following error , check screenshot https://prnt.sc/1azwaym
is it required to fill all parameter at the time of shipment create process and brief about following parameter
(a)taxes_duties_paid_by
(b) is_insured
(c) declared_customs_value
3.Pleae can you provide details about how to get tracking status of any shipment