Method 1 :
Logon to https://incometaxindiaefiling.gov.in/portal/index.jsp
Go to my account.Then go to Form 26AS. No Separate password is not required (i.e. you have to just put your date of birth).
Method 2:In case you have forgot password to login itself
Click on Forgot Password. Put last year E-filing acknowledgement number and thereafter you can reset your password.