Forum Moderators: buckworks
If you will receive your funds from PayPal, I suppose there will be no easy way for your tax office to know how much your real income is.
In most countries, there are some different philosofies for this case.
1. Declare all, pay all the taxes (honest way)
2. Declare some moderate amount (but not everything), pay some taxes (the way of wise)
3. Declare nothing, do not pay taxes from this income (may cause some problems in future).