Bill not uploaded in GSTR 1

What is the date of invoice??

From above it seems the invoice is for FY 2017-18, firstly you cant rectify GSTR-1 as due date for same is completed (Mar'19). Secondly in GSTR-9 you can only disclose but cant upload invoice wise details, hence such invoice would not reflect in Vendor GSTR-2A. However department is allowing input credit if invoice received from vendor is valid i.e., has all required particulars as per Invoice rules.

if it is for FY 2018-19, then show the invoice in next month GSTR-1. due date for same is Sep'19 GSTR-1

Sir, thank u sir, one small issue. Bill date is sep 2018., but our RC voluntarily cancelled on Nov 18. Final return also filed. Now how to know the customer the bill entered by us in gst. Can I reported in 9C, so and so bill not entered in GSTR 1. Pls help.

GSTR-9 and GSTR-9C both are summary details only. invoise wise detailsvwere not allowed to be uploaded. You can disclose sales as per GSTR-3B which is correct

Sir, how to satisfy the customer in this issue

give a declaration on your company letter that gst is paid on same and missed to upload in GSTR-1.Also you can specify circular 59/17/2018 relating to input credot refund, where the department is allowing refund even when invouces were not available in GSTR-2A but valid vendor invoice is available. Also you can assure him that tax and other liability incurred by him if any on account of non showing will be beared by you in case of any notice from department.

OK thank you so much sir