Can anyone advise exactly how they will cease the service ?

If I were to run in a VM , with internet access switched off , and keep system date as before 30/06/2023 how exactly will Intuit prevent me from keeping using it ?

Does it have a built in kill switch (which means it periodically has to check in with HQ)?

I will not be able to use MTD of course (but I can find another way to submit VAT using spreadsheets and bridging software) , and will receive zero support . 

But might be enough to keep me running?