I'm wondering if I sell something online, my customer purchase it and pay me via paypal account directly to my credit card. Do I have to declare income and pay tax for it ?
1. How Revenue department knows if I have an imcome transfer ?
2. Do I have any document to show them that I have an income ?
3. Who is gonna check my credit card balance?
I don't want to avoid tax or doing something wrong about it. But I'm curious and would like to know the best practice regarding this issue.