My answers are as follows:
1. His income is 1.1 lakh pm but i dont have any documentary evidence. so how i can prove his income ?
Ans: You can bring secondary evidence like affidavits of co-workers of your husband etc., which will be guided by your advocate.
2. can court order to him for submit document related to his income .
Ans: On your application Court may direct his employer to submit salary details of your husband or you may examine the employer of your husband as your witness.
3. He have responsibility of our son and his parents also . after that how much maintenance i can expect ?
Ans: As per recent Supreme Court decision you are entitled for 25% of salary of your husband.
The Supreme Court directed a West Bengal resident earning a salary of Rs 95,527 to pay monthly alimony of Rs 20,000 to his ex-wife and 18-year-old son. The couple has been battling it out in court over maintenance since 2003 when the district judge fixed the amount at Rs 4,500. The high court later awarded maintenance at Rs 16,000 per month in 2015 and increased it to Rs 23,000 in 2016 as the husband's salary went up from Rs 63,842 to Rs 95,527.
The man had argued that since his ex-wife was a trained beautician and Montessori teacher earning Rs 30,000 while their son was now an 18-year-old, the alimony amount should be reduced. The ex-wife argued that additional money was required to support the higher education of their son.