Income tax Calculator

i want to use the income tax calculator , i have entered the access token value and the api key but i am getting an error that authorization header requires more credentials.
this is the error: "message": "Authorization header requires 'Credential' parameter. Authorization header requires 'Signature' parameter. Authorization header requires 'SignedHeaders' parameter. Authorization header requires existence of either a 'X-Amz-Date' or a 'Date' header. (Hashed with SHA-256 and encoded with Base64) Authorization=peAkjV9y4s92qFVZY828NIGbRBda0mi6y1T8bEN5RN0=",