Due date for maharashtra state

INCOME TAX - Due date for E-Filing Returns of Income for all the taxpayers extended till 7th September, 2015. 

Forms

https://www.incometaxindia.gov.in/Pages/downloads/income-tax-return.aspx

If you are filing for AY 15-16, Due date has been extended till 7th Sept so it will be on or before due date u/s 139(1). If you file it after due date then it will be u/s 139(4)

Glad I could help :)