Tax Only Credit Note

Resp All

on 29.09.2025 In Few invoices (to Govt entity having GSTN )  we have charges 12% instead of 5% (eff 22.09.2025 New slab) , since the value of transaction not need to be changed so we have issue credit note on "TAX ONLY" and required amount of CGST and SGST mentioned on credite note generated on gepp-einvoice portal on 09.10.2025 and IRN generated on this same date 09.10.2025. We have mentioned date of credit note 30.09.2025 on portal. All ok but this value not reflecting in GST-1 return of sep under credit note (Registered), Please suggest 

Thank you in advance

Suresh Jain