Step 1: Go to google.com and search for your business name
Step 2: In the knowledge panel on the right side, find the link that says "Own this Business?" and click on it
Step 3: If your business has not been claimed yet, you will see a message that says you're eligible to claim this business. Click on Continue
Step 4: Choose the verification method that you have access to. For phone verification (if available), you can have Google call or text your phone number. For email verification (if available) , enter your company email address and you will receive an email from Google
Note: if you don't have access to the listed phone number or email, select None of these work for me.
Enter your name and click on Mail. Google will send you a postcard with a 6 digit code and instructions on how to complete verification.