Fill in a special vAT declaration Shopify

Dear Sir/Madam,

As 0% VAT is charged on the costs of a webshop on Shopify, I, as an exempted entrepreneur, still have to pay VAT here. I have to fill in a special VAT declaration for the first time and I have no idea what to indicate. Is this [71] Intra-Community acquisitions of goods other than new means of transport and excise goods or [75] Intra-Community services with reverse charge? Do the costs for using Shopify fall under trade goods or services?

Thanks in advance for your help!

Kind regards, Iris