Open Google Maps or Google Search and sign in to the Google account used to post the review
Search for the business you reviewed
Open the business listing
Find your review under the Reviews section
Click the three dots next to your review
Select Delete review
Confirm the deletion if prompted
If you cannot find the review, check that you are signed into the correct Google account
If you want to edit instead of delete, choose Edit review from the same menu
If the review was posted on your Google profile, go to your profile and remove it from there