Square is a popular app for Merchants that allows you to link your Instagram account to your Square account. To do this, you will need to create a new Square account and add the Instagram username and password. Once you have added the username and password, open the Square app and click on the link in the top left corner of the main screen. You will then be able to enter in your square login information. After you have entered in your square login information, click on the link in the top right corner of the main screen and you will be taken to a page where you can enter in your square account details. Once you have entered in your square account details, click on the link in the top right corner of the main screen and you will be taken to a page where you can enter in your square order information. Once you have entered in your square order information, click on the link in the top right corner of the main screen and you will be taken to a page where you can enter in your square payment information. Once you have entered in your square payment information, click on the link in the top right corner of the main screen and you will be taken to a page where you can enter into yoursquare order confirmation email address. Finally, click onthelinkinthetoprightcornerofthemainscreento finish entering all of yoursquareaccountdetailsandclosingthepage.YouwillnowhaveanewsquareaccountwithanadditionalSquareorderidandpaymentmethods!