Update tax details for an employee (creates new version).
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
HMRC Tax code (e.g., '1257L', 'K475', 'BR')
"GB"Student loan type
Plan1, Plan2, Plan4 Postgraduate loan?
P45 gross pay
P45 tax amount
Successful Response
Response model for tax details with metadata fields.
"GB"Types of student loan plans
Plan1, Plan2, Plan4