Note on Auto Population of details in Form GSTR 3B from Form GSTR 1 and GSTR 2B

Recently GSTN introduced a facility to auto-populate system computed details in Form GSTR-3B for taxpayers (filing their Form GSTR-1 on monthly basis), from November 2020 Tax Period onwards. The mechanism of such auto population shall be as under:

1. Liabilities in Tables-3.1 & 3.2 of Form GSTR-3B (except Table-3.1 (d) pertaining to inward supplies liable to reverse charge), are computed by the system on the basis of details of outward supplies as filed in Form GSTR-1 for the tax period.

2. Input Tax Credit (ITC) details and details of inward supplies liable to reverse charge, to be reported in Tables-4 and 3.1 (d) respectively, are computed as per system generated Form GSTR-2B for the tax period

3. Values are auto-populated in GSTR-3B for the assistance of taxpayers. However, taxpayers have to ensure the correctness of the values being reported and filed in GSTR-3B in all respects. Consequently, the auto-populated values can be edited by the taxpayers, if required. The system will prompt the taxpayers with an alert in cases where the variance of the edited values from the auto-populated values is higher than a particular threshold. However, the taxpayers may continue their filing with the edited values, and system will not restrict the same.

4. If the taxpayer has entered & saved any values in GSTR-3B before auto-population by the system, the saved values will not be changed/over-written by the system.

Manner of Generation of Auto Populated Values –

GSTR 3B Table GSTR 1/2B Table Remarks
Table 3.1(a) – Outward taxable supplies (other than zero rated, nil rated and exempted) FORM GSTR-1:

Tables-4, 5, 6C, 7, 9, 10 and 11

Values in these tables are computed by doing a total of all the values reported by the taxpayer in the corresponding tables of GSTR-1.

This is auto-populated from FORM GSTR-1. Net positive values shall be reported in respective tables. Net negative values, if any, shall not be considered in the table and system will provide the value as zero.

Table 3.1(b) – Outward taxable supplies (zero rated) FORM GSTR-1:

Tables-6A, 6B and 9

Table 3.1(c) – Outward taxable supplies (Nil rated, exempted) FORM GSTR-1:


Table 3.1(e) Non-GST outward supplies FORM GSTR-1:


Table 3.2 Of the suppliers shown in 3.1(a) above, details of inter-state supplies made to unregistered persons, composition taxable persons and UIN holders FORM GSTR-1:

lace of Supply (PoS)-wise details declared in corresponding tables

Place of Supply (PoS)-wise details of inter-state supplies made to unregistered persons, composition taxable persons and UIN holders.
3.1(d) Inward supplies liable to reverse charge FORM GSTR-2B:

Table 3 Part A Section III

Table 4 Part A Section III

This is auto-populated from FORM GSTR-2B. Positive values shall be reported in respective table. Net Negative values, if any, shall not be considered in the table and system will provide the value as zero.

If the actual liability is more than the value auto-populated by the system, the taxpayers should edit & report the correct value in FORM GSTR-3B.

The system computed values do not contain the values pertaining to the supplies received from unregistered persons liable to reverse charge, and tax to be paid on reverse charge basis on account of Import of Services. Therefore, these details have to be included by the taxpayer by editing the auto-populated value.
4A (1, 3, 4, 5) ITC Available FORM GSTR-2B:

Table 3 Part A Section I, II, III, IV

This is auto-populated from FORM GSTR-2B. Positive ITC values shall be reported in respective tables.

Negative values shall be considered as ITC reversal and would be reported in table 4B(2)

4B(2) ITC reversed – (2) Others FORM GSTR-2B: Table 3 Part B Section I Table 4 i.   Positive values of all credit notes, on which ITC is available. If this is negative, then credit may be reclaimed subject to reversal of the same on an earlier instance.

ii. Positive values of all credit notes, on which ITC is not available

iii. In case there are negative values in ITC available table 4A (1,3,4,5), then such negative values shall be reversed and considered in this table.

5. This facility has been made available for monthly filers as of now. It would be enabled for quarterly filers also in due course.

6. If any invoice and credit note have been issued in same month, then both have to be reported separately

7. In case net ITC available in table 4C is in negative, then such negative value shall be considered as liability

8. Table 5 and 6.2 of FORM GSTR-3B is not part of the PDF & will not be auto-populated by the system

Comments by Tax Marvel – The Auto-populated details provided by GSTN is a useful facility for the taxpayers to eliminate differences between figures reported in GSTR 1 and GSTR 3B as well as details of ITC populated in GSTR 2B. Tax payers should reconcile their ITC as per Books and as per GSTR 2B.

There may be reasons for differences for ITC as per Books and populated in GSTR 2B. Some of the possible reasons for differences may be as under –

1. Receipt of Goods in subsequent period – Suppliers shipping the materials but same is physically received in subsequent month – ITC may populate in GSTR 2B but not eligible in current month.

2. RCM not reported by Suppliers – RCM supplies not reported by suppliers in their GSTR 1 hence not populated in GSTR 2B but same may be paid and claimed as ITC as per books of accounts.

3. Ineligible ITC – ITC appearing in GSTR 2B but said is not eligible as per Sec 17(5) of CGST Act, 2017 or Rule 42 or 43 of CGST Rules, 2017.Hence, entity may not claim ITC on said invoices.

4. ITC availed before introduction of GSTR 2B – (i.e. as per GSTR 2A plus 10% rule) and supplier reporting said invoices in return filed subsequently (same appearing in GSTR 2B) but ITC already availed by the entity.

A thorough reconciliation is required on periodical basis (monthly or fortnightly) for eliminating any eligible credit being left out of claim of excess ITC.

Remember, excess ITC may have to be reversed with 24% interest and may also attract penalty during departmental audit.


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Disclaimer: The content of this document is for general information purpose only. TaxMarvel shall not accept any liability for any decision taken based on the advice. You should carefully study the situation before taking any decision.

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January 2021