Yes, it is possible to rectify any errors in your document submission after the selection process. Rest assured that the mistake you made does not disqualify you from sitting for the exam.

Students can know more about the details from here https://competition.careers360.com/articles/ssc-chsl-exam-dates

Hello Dear Student,

If your Board is CBSE and you was a student of CBSE Delhi Region (CBSE have different zones and regions to regulate the Board in different states) then I think it's not a mistake because Haryana falls under CBSE Delhi Region and If you think that you have done some mistake then do not worry, it's just a minor mistake, If you have filled your Roll number and Marks properly then there will not be any problem in CHSL Application process but Still If you are worried then you can contact to CHSL Authorities for Rectification, they may open online window for correction after some days.

All the Best