make phone calls from my MacBook Air

Hi FirstCorinthians13

Welcome to Apple Support Communities. We have a support resource just for your question! These are the steps you need to take to get rolling with making calls on your Mac.

Make and receive calls on your Mac, iPad, or iPod touch - Apple Support

"You can use iPhone Cellular Calls with any Mac, iPhone, iPad, or iPod touch that meets the Continuity system requirements. It works when your devices are near each other and set up as follows:

1. Each device is signed in to iCloud with the same Apple ID.
2. Each device is signed in to FaceTime with the same Apple ID.
3. Each device has Wi-Fi turned on.
4. Each device is connected to the same network using Wi-Fi or Ethernet.
5. On your iPhone, go to Settings > Phone > Calls on Other Devices, then turn on Allow Calls on Other Devices.
6. On your iPad or iPod touch, go to Settings > FaceTime, then turn on Calls from iPhone.
7. On your Mac, open the FaceTime app, then choose FaceTime > Preferences. Click Settings, then select Calls From iPhone.
8. If your carrier supports Wi-Fi calling on other devices, you can set up those devices to make and receive calls even when your iPhone isn't turned on or nearby. Learn about Wi-Fi calling.

Make and receive phone calls

Learn how to make and receive phone calls on your Mac, iPad, and iPod touch.

• 
• Make a call on your Mac
• Move the pointer over any phone number in Contacts, Calendar, Safari, or other app that automatically detects such data. Click the arrow in the box that outlines the phone number, then choose Call [phone number] Using iPhone.
• Or open the FaceTime app, enter a phone number in the search field, then click  Audio."

Let us know if you run into any issues.

Cheers!