To create an insurance company, you need to include it as a customer.

In the left menu, click on Clients > Clients > + New.

In the Info tab, fill in all the information and in the mode, select Business.

Click on Save.

Then click on the Terms tab and select the options ''This client can pay with receivables'' and ''Add to 'Bill to' drop-down menu''.

Click on Save.

When you follow the steps at the Point of sale, after selecting the insurance form and clicking on the red dialog box, the window that appears asks you for the accident data.

In the Insurer's name option, the insurance companies will be listed (if they have previously been listed as a client).

Once you have selected the correct company, click on Save and close.

Other articles on the subject: 

Replace or Install Glasses with Insurance Without the Insurance Module 

Use the Insurance Module for a Claim or for Windshield/Glass Repair/Replacement

Deductible Management and Insurance Invoicing

Create an Insurance Type Category