Hello,
I’m no expert by any means but after a great deal of research I did mine this morning with my Go Daddy account and it worked just fine. First I confirmed that the SPF and DKIM records already existed in my account (they were already there, I did not specifically add them). I then added the following DMARC Record:
Name of text record
_dmarc.xxxxxxx.com
Value of text record
v=DMARC1; p=none; rua=mailto:xxxxxx@xxxxxxxx.com
I then checked that the DMARC was verified, and it was. I not sure if your situation is different then mine, I also use Office 365 through Go Daddy