Hello Anamika,
As per official guidelines, the income,domicile and medical certificate are not be older then 6 months of date of issuance. So, No, you can not use previous year documents and need to get them reissued from regional authority.
However since you have your older copies with you,issuance of new documents will be easier. So, visit any E-Mitra near you and apply for same.
Good luck!