Small business owner with Google Play AdMob UStVA, ZM and reverse charge invoices?

Hello everyone, I am a student and have registered a small sole proprietorship for app development. I use the small business regulation according to §19 UStG. My income from Google Play and AdMob has been very low so far, totaling just a few euros or cents per day. I have a VAT ID number. receive. Since then I have been receiving small invoices from Google Commerce Limited, Ireland for Google Play Apps, e.g. E.g.: March 2026: €0.12 May 2026: €0.17 The invoices say: “Service