Make sure you have the latest version of the Instagram app.
You should already have completed set up for shopping on Instagram before you can enable it from your Instagram App.To enable the ability to feature products from the Instagram App:
Go to your profile and tap
Tap Shopping. Note: The option to tap Shopping is only available to accounts that have been approved for Instagram Shopping.
Select a product catalog to connect to your professional account.
Once you’ve signed up for Instagram Shopping, you are ready to post your product catalog through your posts and stories – and there you go, you’re making sales! Promoting through Instagram could not get any easier.For Instagram posts, upload your photo or video and tap the items you wish to tag. You can tag five products per post. With more than 500 million users watching Instagram Stories every day, Instagram Shopping also allows you to tag one product per story.