Step 1.

• Sign in to your www.blogger.com account
• Go to layout or Template in Dashboard
• Click on Add Page Element
• Select adsense from the pop-up window
• Once the adsense section is added to your layout, Click on Edit in the adsense section of your layout to Configure the Adsense
• Select the adsense format and save the changes
  

Step 2.

• Sign in to your adsense account
• Go to My Account
• Go to Account Access
• Click on grant access to approve it