01 April 2015
I think you mean to say in challan Date of Deposit is 31.03.2015 but you wrongly entered the same in ITR as 31.03.2014.
There will not be any issue as the details will be traced based on BSR code and challan no. Also the tax will be reflected in 26AS.
Revised return not possible since you filed the belated return of AY 2014-15. (Date of Deposit of Tax is 31.03.2015, so return must have been filed on 31.03.2015).