Yes. You can issue a TDS certificate for a year, if your client accepts such practice. But, while issuing TDS certificate for a year at one stretch, ensure that it is issued within one month from the end of the relevant financial year.
yes, you can issue TDS Certificates on a yearly basis provided the daetails as to month of deduction and remittance for the 12month period has to be listed with totals and should be issued before 30th of April