GDPR gives individuals the right to ask organizations to delete their personal data, this right is also known as "Right To Be Forgotten" (RTBF).
Typeform provides API for customers to implement RTBF for their respondents. For example, you can delete all responses from your account that contain respondent email.
However, deletion process can take some time, especially for accounts with a lot of workspaces and forms with big number of responses, so it will require requesting several endpoints to ensure responses were successfully deleted:
It is important to check job status unless it will be equal to "Done", because only status "Done" guarantees that responses were successfully deleted.