This discussion clarifies the filing requirements for Table 6a of GSTR-1, particularly for dealers under the QRMP scheme. While the QRMP scheme mandates quarterly filing, the content suggests that Table 6a is not universally compulsory and may be disabled if not applicable or required for a specific filing period.
If you are asking about QRMP Scheme then filing is mandatory on quarterly basis only. And i didn't come across any such notification which makes Table 6A of GSTR 1 as compulsory.