When do the tones change? Sometimes, in certain combinations of tones or words, the tones change. Where can I find a complete list of all tone changes that occur in Mandarin?
Complete rule of tones change is not a simple subject which can be understood just b a list. But there is a simple one I think might be suitable for you. http://www.trinity.edu/sfield/chin1501/ToneChange.html

Plus, if you are a foreigner who want learn Chinese without academic purpose, I think it's enough since many Chinese cannot use tones change complete correctly.