Steps
On Home, select Tasks for approval to open the tasks waiting for you. It's the same list as the Waiting for my approval quick view in Tasks. You can also open a task from the notification email.
Open the task. Under Approvers, you're shown as the approver, with the approval due date below. The activity shows who sent the task for approval and their comment.
Check the information and the documents that were submitted.
If everything is correct, select Approve. The activity records your approval and the task is completed.
Request changes
Select Request changes.
Write a comment that explains exactly what to fix. For example: the VAT position doesn't match the return; please upload the corrected return.
Select Request changes. The task goes back to the assignee with your comment.
When a task has several approvers, you can also send it back to the previous approver.