The sitemap url is incorrect in infinite seo

I searched the forum and the responses were for very old versions , but my issue is similar.

The Path to the XML Sitemap I coded to be under the \wp-content\uploads\sitemap.xml
but the URL to the XML Sitemap (which I cannot change is going to another domain for another site on my hosting account.
This file does not have the correct information.
http://www.othersite.com/sitemap.xml

SEO is last on the list to turn on when you are ready to go live; I am now live and SEO is not working--- not the start you want.

Mike