This is due to the fact that providers require Intuit support and development to sustain compatibility with QuickBooks products. If you are using 3rd party applications that integrate with your QuickBooks, it is highly recommended that you upgrade. If you continue to use QuickBooks 2015, Intuit live technical support will no longer be able to provide support to you if an issue arises within your product or data file. You can prevent your essential add-on services from becoming obsolete by upgrading to QuickBooks Desktop 2018. If you’re using QuickBooks Desktop 2015, access to important add-on services will stop working as of May 31 st, 2018.