GSTR7 Return Not filed for earlier month - How to upload details of missed month

As per my view, you can upload of Oct month remaining details in Dec month only . As, November's month return already been filed.  

Sir,

I am a little confused with the clarification, hence would like to elaborate the issue.

In the first step of the GSTR7 online return for Oct-23, we are unable to save the supplier details of Net Invoice, TDS under CGST & SGST and the following error, "Return is filed or ready to be filed in future period" is being shown.

As per my understanding, we can only pay the late fees & interest that is auto calculated by the GST portal after the saving the supplier details. 

So therefore, I would be extremely grateful if you may guide on the alternate process that may be followed.