How to legally reduce taxes?

I’m a sole developer and have to pay 45% taxes on my Admob earnings.
Is it possible to pay less without physically relocating to Cayman Islands or another “tax haven”?
Are there companies that could help (without breaking the law)?

ask a tax advisor not here. every country is different and has different tax laws.

That`s a quite complicated subject, but first of all at least you should mention where is your company registered currently?