Introduction<\/p>\n
GST return filing is becoming increasingly system-driven. After the introduction of hard-locking for outward liability figures in GSTR-3B, attention has now shifted to Table 4, which deals with Input Tax Credit (ITC).<\/p>\n
There has been significant discussion around ITC hard-locking during 2026, particularly the possibility of restricting manual changes to ITC auto-populated from GSTR-2B and linked with the Invoice Management System (IMS). However, as of 20 August 2026, taxpayers should not treat July 2026 as an officially confirmed effective date for Table 4 hard-locking. No GSTN advisory confirming such a date could be verified.<\/p>\n
That does not mean businesses should wait. The direction is clear: ITC reconciliation needs to happen before GSTR-3B is filed, rather than relying on manual corrections inside the return.<\/p>\n
What Is Changing?<\/p>\n
Table 4 of GSTR-3B reports the ITC available, ITC reversals and net ITC claimed.<\/p>\n
At present, the portal auto-populates relevant ITC figures, principally based on GSTR-2B, but Table 4 has remained editable. GSTN’s own guidance has historically confirmed that auto-populated GSTR-2B figures could be edited in GSTR-3B.<\/p>\n
The expected direction of the proposed hard-locking is that eligible ITC, particularly the credit flowing from supplier-reported invoices, would become more closely tied to system-generated data.<\/p>\n
In simple terms:<\/p>\n
Earlier approach:
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Purchase register \u2192 reconciliation \u2192 manually adjust GSTR-3B.<\/p>\n
System-driven approach:
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Supplier reporting + IMS actions \u2192 GSTR-2B \u2192 GSTR-3B.<\/p>\n
This makes the quality of purchase data and timely reconciliation much more important.<\/p>\n
Why GSTR-2B and IMS Matter<\/p>\n
If ITC becomes restricted to system-generated figures, businesses cannot depend on making last-minute changes while preparing GSTR-3B.<\/p>\n
A supplier who has not correctly reported an invoice can therefore create a practical ITC issue for the recipient.<\/p>\n
Before filing, businesses should check:<\/p>\n
Whether the invoice appears in GSTR-2B.
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Whether the supplier GSTIN and invoice details are correct.
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Whether the invoice relates to the correct tax period.
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Whether the ITC is legally eligible.
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Whether blocked credit under Section 17(5) has been excluded.
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Whether previous ITC reversals are properly tracked.
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Whether eligible ITC has been reclaimed correctly.
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Whether relevant IMS actions have been completed.
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What Businesses Should Do Now<\/p>\n
The safest approach is to move from \u201c3B preparation\u201d to \u201cmonthly ITC control.\u201d<\/p>\n
Maintain a proper reconciliation between:<\/p>\n
Purchase Register + GSTR-2B + IMS + Books of Accounts<\/p>\n
Do not wait until the GSTR-3B filing date to identify missing invoices.<\/p>\n
If an eligible invoice is missing from GSTR-2B, follow up with the supplier early. If an invoice is incorrect or not eligible, resolve the issue before claiming the credit.<\/p>\n
This becomes particularly important for businesses with a large number of vendors, because even a small mismatch across hundreds of invoices can affect the monthly ITC figure.<\/p>\n
What About ITC Reversals?<\/p>\n
Hard-locking should not be confused with making every part of Table 4 completely automatic.<\/p>\n
ITC reversals and other adjustments involve taxpayer-specific calculations. These include reversals under Rules 38, 42 and 43, Section 17(5), and other applicable situations.<\/p>\n
Therefore, taxpayers should continue maintaining proper workings for:<\/p>\n
Rule 42\/43 reversals
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Section 17(5) blocked ITC
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180-day payment-related reversals
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Reclaims of previously reversed ITC
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Other eligible adjustments<\/p>\n
The exact field-level treatment should be followed based on the final GSTN implementation\/advisory rather than assumptions circulating in the market.<\/p>\n
A Practical Survival Strategy<\/p>\n
If Table 4 hard-locking is implemented, the businesses that are already reconciling monthly will have the least difficulty.<\/p>\n
A simple monthly process can help:<\/p>\n
Step 1: Download GSTR-2B.<\/p>\n
Step 2: Reconcile it with the purchase register.<\/p>\n
Step 3: Identify missing, duplicate and incorrect invoices.<\/p>\n
Step 4: Review IMS actions and resolve pending records.<\/p>\n
Step 5: Check ITC eligibility under the GST law.<\/p>\n
Step 6: Calculate reversals and eligible reclaims.<\/p>\n
Step 7: Finalise the ITC figure before preparing GSTR-3B.<\/p>\n
This changes the mindset from \u201cHow do I edit Table 4?\u201d to \u201cHow do I make sure Table 4 is correct before I reach the return?\u201d<\/p>\n
Important 2026 Position<\/p>\n
One point should be kept clear while discussing this topic.<\/p>\n
GSTR-3B Table 4 ITC hard-locking from July 2026 should currently be described as an expected\/proposed system change unless and until GSTN issues an official advisory confirming its effective date and exact implementation.<\/p>\n
In contrast, the hard-locking of outward liability is already an established change. GSTN introduced non-editable outward liability reporting from the July 2025 tax period, with GSTR-1\/GSTR-1A becoming important correction mechanisms.<\/p>\n
Conclusion<\/p>\n
The biggest lesson from the move towards system-generated GST returns is simple: manual correction at the GSTR-3B stage is becoming less dependable.<\/p>\n
Even though Table 4 ITC hard-locking from July 2026 should not be presented as officially confirmed without a GSTN notification or advisory, businesses should prepare as though reconciliation will increasingly happen upstream.<\/p>\n
A clean purchase register, timely vendor follow-up, proper IMS review and regular GSTR-2B reconciliation will make the transition much easier.<\/p>\n
For taxpayers, the safest strategy is not to wait for the portal to stop allowing edits. Get the ITC right before filing GSTR-3B<\/p>\n","protected":false},"excerpt":{"rendered":"
GSTR-3B Table 4 ITC hard-locking in 2026 explained. Learn the latest GSTN position, GSTR-2B, IMS, ITC reconciliation and how businesses should prepare.<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[6],"tags":[],"class_list":["post-1654","post","type-post","status-publish","format-standard","hentry","category-compliances"],"_links":{"self":[{"href":"https:\/\/www.taxaj.com/learn\/wp-json\/wp\/v2\/posts\/1654","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.taxaj.com/learn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.taxaj.com/learn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.taxaj.com/learn\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.taxaj.com/learn\/wp-json\/wp\/v2\/comments?post=1654"}],"version-history":[{"count":0,"href":"https:\/\/www.taxaj.com/learn\/wp-json\/wp\/v2\/posts\/1654\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.taxaj.com/learn\/wp-json\/wp\/v2\/media?parent=1654"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.taxaj.com/learn\/wp-json\/wp\/v2\/categories?post=1654"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.taxaj.com/learn\/wp-json\/wp\/v2\/tags?post=1654"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}