What I need from you:
Business name, address, contact details like website address, phone number, etc. as well as what your business does along with relevant pictures - which represent your business or services offered.
I will create a business listing for your business at which point Google will send you a postcard at the business location. You'll need to provide the code mentioned within that postcard for me to authenticate the business.
Creating the business listing takes about 5 minutes. Postcard verification takes anywhere from 7-14 days. That's where delays may happen (outside of my control and influence).