Apex domains cannot have CNAME records.
Question and response
Question
dig vfmcpa.com. NS
Answer
vfmcpa.com. 5 NS ns-1863.awsdns-40.co.uk.
vfmcpa.com. 5 NS ns-1302.awsdns-34.org.
vfmcpa.com. 5 NS ns-1079.awsdns-06.org.
vfmcpa.com. 5 NS ns-1984.awsdns-56.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0