With the demise of tax filer has anyone used Iris elemetns and how does it compare?

Allow me to route you to the appropriate support who can provide you with a comparison of Iris elements and tax filer, MCFHS.
 

To provide you with information about Iris elements and their comparison to other accounting software, I recommend you visit their page or forum.

Additionally, I'll share this resource to guide you about managing your taxes in QBO: Taxes QuickBooks Online UK.
 

Whenever you have questions related to QuickBooks products and services, I'll be around to assist. Stay safe!