If you are need to add Brazil Country specific checkout fields, you need to install 3rd party plugin WooCommerce Extra Checkout Fields for Brazil By Claudio Sanches. You can download from here.
After Install and configure this plugin, extra Shipping and Billing fields will get added to AeroCheckout form.
The fields would be available
- Person Type
- Cell Phone
Here is the preview of checkout fields
Few Settings to make this functional
1. Keep Company field *optional* in WooCommerce Customize settings
Setting available at Dashboard > Appearance > Customize > WooCommmerce > Checkout
2. Keep Company field *Visible* in AeroCheckout billing fields