Not subject to vAT – Architect intern customer list + vAT regime in Dexxter

Dear Sir/Madam,

As an intern architect, I am not subject to VAT. Do I need to create a customer list?

My accountant has also set up my Dexxter profile as not subject to VAT. I am looking to activate my vAT number, but in Dexxter I get an error message saying that due to Article 44 (this was the only option as I am not subject to VAT), I cannot change this.

Any advice?