The following official sources offer free computer-based practice modules:
IELTS 20 Practice Test General Training Student's Book with Answers with Digital Pack : This is a highly authoritative resource from Cambridge University Press & Assessment ielts practice test general computer based
The computer-based test consists of four sections. While three are digital, the Speaking section remains a face-to-face interaction. IELTS Australia Practice tests for IELTS on computer ielts practice test general computer based