ABCDEFGHIJKLMNOPQRSTUVWXYZ
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File GSTR Request (URL parameters other than action)
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Sl No
Parameter Name
DescriptionField Specification
Mandatory
Sample Value
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1actionAction key specific to the requestStringYRETFILE
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2dataGet GSTR3B detailsGet GSTR3B detailsY
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2signPKCS#7 signature of SHA-256 hash of Base64 of response of getGSTR3BSummary using private key of Tax Payer (Authorized signatory)
If st =EVC,sign will be HMAC-SHA256 of base64 of summary payload using encoded base 64 {PAN+ OTP} 		StringY
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3stType of signature – DSC or ESIGN or EVCString (Maxlength:5)YDSC/ESIGN/EVC
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4sidPAN of authorized representative if st = DSC or AADHAR no. of authorized representative if st=ESIGN
If st=EVC,sid will be <PAN of authorized representative>|<OTP>
Alphanumeric (Max Length:15)
Yif st=EVC
ACXPK3463A|A3D676
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File GSTR3B - Response
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S No
Parameter Name
DescriptionField Specification
Mandatory
Sample Value
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3
ack_num
Acknowledgement Number
Alphanumeric with 15 characters
YAA0112160011463
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