Practical Challenges in GSTR-3B Filing: ICAI Clarifies ITC Reversals, RCM and IMS Issues

GSTR-3B filing now involves far more than tax payment and return submission. Every entry in the return impacts ITC availability, reclaim eligibility, RCM reporting, IMS validation and portal-generated liabilities. A reporting mistake in the wrong table can block credit, create ledger mismatch or trigger departmental scrutiny.

Recently, ICAI released FAQS on GSTR-3B filing addressing several recurring issues faced by taxpayers including wrong ITC reversals, reclaim reporting, RCM credit classification, IMS credit notes and Rule 42/43 adjustments.

Why GSTR-3B Filing Has Become More Sensitive

GSTR-3B works with data from different sources. Outward supplies come from books, e-invoice data, GSTR-1 and GSTR-1A. ITC comes from GSTR-2B, import records, RCM workings and internal purchase registers. IMS adds one more layer for invoice and credit note action.

So, a taxpayer must match return data with records before filing. The portal reads each table with a specific purpose. It does not treat all ITC entries in the same manner.

For example, ITC shown as a temporary reversal creates a balance in the reclaim statement. ITC shown as a permanent reversal does not. RCM credit shown in the wrong place does not destroy the credit if the tax is paid and the credit is eligible. But it creates reporting concerns and validation issues.

Read More: GSTAT Notifies Bench Composition & Category-Wise HearingStructure Across India

Legal Position on ITC Reversal in GSTR-3B

Table 4(B)(1) and Table 4(B)(2)

Table 4(B)(1) is meant for permanent ITC reversals. This includes blocked credit under Section 17(5) of the CGST Act, 2017, and reversals under Rules 38, 42 and 43 of the CGST Rules, 2017.

Table 4(B)(2) is meant for temporary reversals. This covers cases where ITC is reversed for the time being and is open for reclaim in a later tax period.

This difference matters because the Electronic Credit Reversal and Re-claimed Statement tracks reversals reported in Table 4(B)(2). It does not track amounts reported in Table 4(B)(1).

If a taxpayer reverses eligible ITC in Table 4(B)(1) by mistake, the credit is not lost on that ground. The reclaim is subject to Section 16(4) time limit. Since the reclaim ledger does not capture this amount, the taxpayer has to adjust the same amount in a later GSTR-3B by reducing genuine permanent reversals in Table 4(B)(1).

Wrong Permanent Reversal in Table 4(B)(2)

The opposite error also creates trouble. If permanent ineligible ITC is shown in Table 4(B)(2), the portal treats it as temporary reversal. This inflates the reclaim statement.

The taxpayer must identify the tax period, amount and tax head. Fresh permanent reversal must go to Table 4(B)(1). Past wrong reporting in Table 4(B)(2) requires an offsetting entry in the current tax period to neutralise the ledger impact. The adjustment must be revenue neutral and must not result in excess ITC claim.

RCM Reporting Issues in GSTR-3B

Reverse charge mechanism is another area where taxpayers make filing mistakes. In RCM cases, the recipient pays tax. The liability is reported in Table 3.1(d) of GSTR-3B.

Where RCM liability on import of services has been paid in Table 3.1(d), but the ITC is shown in Table 4(A)(3) instead of Table 4(A)(2), the error is a procedural lapse. The ITC is not denied if tax has been paid under RCM and the credit satisfies the law.

The taxpayer must correct the disclosure in a later GSTR-3B or in the annual return in Form GSTR-9.

Reclaim of RCM ITC

A separate issue arises when RCM ITC is reversed in Table 4(B)(2) and reclaimed in a later period. The reclaim must be shown in Table 4(A)(5), “All other ITC”, and also disclosed in Table 4(D)(1).

It must not be shown again in Table 4(A)(2) or Table 4(A)(3). The reason is simple. The portal checks RCM ITC against RCM liability and RCM ledger balance. If an old RCM reclaim is routed through the RCM ITC table, the portal will treat it as a current RCM claim and trigger a validation issue.

Read More: GST on Personal Guarantees By Directors: When Can Tax LiabilityArise?

IMS Credit Notes and Double ITC Reversal

IMS has changed the way taxpayers handle invoices and credit notes. If a supplier uploads a credit note and the recipient takes no action, the system treats it as accepted. GSTR-2B then reduces the ITC, and the reduced figure flows into GSTR-3B.

This creates a problem where the recipient has reversed the ITC in an earlier period, for example under Rule 42, Rule 43 or Section 17(5). If the recipient accepts the reduced auto-populated figure without action, the same ITC gets reversed twice.

The correct step is not to override GSTR-3B by hand. The taxpayer must use the ITC declaration facility in IMS. The taxpayer must state the actual ITC availed against the original invoice and the amount that requires reversal. If ITC was never availed, no reversal is required. If ITC was availed in part, reversal applies to that part alone.

Practical Examples for Indian Taxpayers

Situation	Correct treatment
A CA firm reverses eligible ITC in Table 4(B)(1) by mistake	Reclaim remains available within Section 16(4). Adjustment is required in later GSTR-3B
An IT company pays RCM on import of software service but reports ITC in the wrong RCM table	ITC is not denied if tax is paid and credit is eligible
A trader reports permanent blocked credit in Table 4(B)(2)	Reclaim ledger gets inflated. Offset adjustment is required
A supplier credit note is accepted through IMS, but ITC was reversed earlier	IMS declaration facility must be used to avoid double reversal
Import IGST on goods is not in GSTR-2B	ITC is available based on Bill of Entry, IGST payment proof and books

Tax and Compliance Impact

Wrong GSTR-3B reporting has a direct tax impact. It affects working capital, refund claims, interest exposure and departmental scrutiny.

A wrong permanent reversal blocks reclaim. A wrong temporary reversal inflates the reclaim ledger. Wrong RCM reporting creates validation mismatch. Missing invoice correction through GSTR-1A affects the recipient’s ITC. IMS inaction on credit notes results in deemed acceptance and impacts GSTR-2B.

Interest and late fee also need attention. Late fee in Table 5.1 is not editable. Interest is editable upward alone and cannot be reduced below the system-computed amount. Where the amount is wrong, the taxpayer must use the Re-compute Interest option and raise a grievance if the issue remains.

Support our journalism by subscribing to Taxscan premium. Follow us on Telegram for quick updates