Changes to Create a new Tax Registration

the request property customerId became not nullable

the request property merchantId became not nullable

the request property state became not nullable

deleted the header request parameter Sequence-Version

added the new optional header request parameter sequence-version

the response property customerId became nullable for the status 201

the response property merchantId became nullable for the status 201

the response property state became nullable for the status 201

the request property customerId became nullable

the request property merchantId became nullable

the request property state became nullable