I used tca 30% 4 minutes for face 1month ago , i got burn , i use now hydroquinone4% but i didn't get better, i am going to use benoquin20%, can i?

Wait: You have not given the hydroquinone long enough time to work. I hope you were using it with a sunscreen. Please be patient. Do not use benaquin since it will turn your skin white.There is also a bleaching cream which is a combination of a hydroquinone, a cortisone cream, and a retinoid. That might work better then a hydroquinone alone, although it is more expensive.

Benoquin (monobenzone): Do not use benoquin (monobenzone) as the results can cause total depigmentation that cannot recover. Your skin could be totally white without any pigment.