Form 26as

https://incometaxindiaefiling.gov.in/

GO WITH INCOME TAX SITE ........it will not ask challan no.

Register yourself with NSDL from I Tax site & I am sure your issue will get solved

Agree with Shikhar. Income tax website has a link for view 26AS.

https://incometaxindiaefiling.gov.in/e-Filing/UserLogin/LoginHome.html?nextPage=taxCred 
Click the above link for 26AS download. 

And if you want to open in traces then contact them through mail, they reverts are very quick in these matters, trust me. 
Your querry might get solved in no time. 

Regards, 

https://taxspanner.com/product-tours/how-to-view-or-download-form-26as-statement/

go to this link...

https://taxspanner.com/product-tours/how-to-view-or-download-form-26as-statement/

...

You can View 26AS on Income tax Site other wise u can also try filing deductor details while registering in TRACES.

Dear,

Visit the website for income tax e-filling.

Than register you PAN details.

Create Login Id & Passwod.

You can see form 26 AS option in left side after login .

Check out 26 AS.