Filed by Chartered Accountants. Not by algorithms.
Monthly GST compliance for online sellers across marketplaces, GSTINs, TCS credits, IMS records, HSN checks and state-wise liability.
Platforms we work with
We file GST for sellers on every platform.
11th
Sales data must be correct before 3B locks
20th
Monthly tax payment and return filing
0.5%
Cash-ledger credit only after portal action
3 years
Delayed returns can become impossible to file
Each date feeds the next one, so seller GST is managed as a monthly control cycle.
11
Sales register and Table 3.2-ready outward supply filing.
All active seller GSTINs
13
ISD credit distribution where common input-service invoices are received centrally.
ISD sellers
14
Invoice actions before 2B generation and ITC lock.
Purchase-side credit control
20
Tax payment and hard-locked monthly return filing.
All active seller GSTINs
TCS
Marketplace TCS acceptance into electronic cash ledger.
Marketplace sellers
We also watch e-invoicing, e-way bill validity, RCM, HSN rate changes and the three-year return filing bar during the monthly close.
Our ecommerce GST return filing service manages GSTR-1, GSTR-3B, GSTR-6 where ISD applies, TCS credit acceptance and IMS actions in one monthly cycle. It is built for sellers whose tax liability comes from marketplace reports, not just invoices prepared manually.
We connect monthly GSTR-1 and GSTR-3B filing with marketplace and payment reconciliation so every state, TCS credit, HSN rate and return adjustment is checked before the month locks.
E-commerce GST compliance is the monthly cycle of filing GSTR-1 by the 11th, GSTR-3B by the 20th and GSTR-6 by the 13th where ISD applies, while accepting marketplace TCS credits from GSTR-8 and acting on IMS records before your input tax credit locks under Section 38.
The 2025-26 filing reality is stricter than the old file-and-forget workflow. GSTR-3B values have been hard-locked since July 2025, Table 3.2 is non-editable from November 2025, and IMS inaction can become deemed acceptance. The return has to be checked before it is filed.
This page is for ongoing managed filing, not registration basics. For the setup obligation, read our GST registration for e-commerce sellers page; for the broader accounting layer, connect it with e-commerce accounting and bookkeeping.
GSTR-8 credit is visible but not usable until accepted on the portal.
We match platform data and accept valid TCS credits every month.
GSTR-1 sales and GSTR-3B tax payment do not agree after returns or credit notes.
We reconcile marketplace reports before filing and report variances.
No action can become deemed acceptance or missed rejection under the new IMS regime.
We review accept, reject and pending decisions before 2B generation.
Marketplace catalogues may keep old rates after the September 2025 restructuring.
We flag SKU and HSN rate mismatches during filing review.
| Factor | RecommendedMarketplace seller | D2C seller |
|---|---|---|
| Registration trigger | Mandatory for marketplace selling | Threshold or voluntary, depending on facts |
| TCS 0.5% | Marketplace deducts and reports in GSTR-8 | Usually not applicable |
| GSTR-8 credit flow | Accept on portal into cash ledger | Not a regular monthly step |
| E-invoicing trigger | AATO-based threshold still applies | AATO-based threshold applies |
| Place of supply | Delivery-state mapping is critical | Usually simpler unless multi-state |
| ISD requirement | Common for multi-state GSTINs | Needed if common services span GSTINs |
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Hybrid sellers often need both tracks, with marketplace TCS controls plus D2C payment-gateway reconciliation.
Review GST workflowSettlement, sales, return, fee and TCS reports are pulled GSTIN-wise.
We prepare outward supply data with place-of-supply and Table 3.2 accuracy.
Purchase records are accepted, rejected or kept pending before 2B locks.
ITC is matched with books and blocked credits are identified.
Tax liability, ITC, RCM and payment are reviewed before 3B filing.
GSTR-8 credits are matched and accepted into the electronic cash ledger.
You receive exceptions, open credits, mismatch notes and next actions.
Multi-state sellers need GSTIN-wise control because inventory, fulfilment centres and delivery states affect reporting. APOB registrations, virtual place of business setups and marketplace fulfilment reports must tie into the monthly return workflow.
We track place of supply, state-wise liability, RCM applicability, ineligible ITC, cross-charge versus ISD questions and common input-service invoices. Since ISD became mandatory from 1 April 2025 for many multi-state structures, seller GST cannot be reviewed one GSTIN at a time in isolation.
From the October 2025 tax period, ITC is tied to accepted IMS records under Section 38. We review every record before 2B generation on the 14th, every month.
Eligible invoices are accepted after matching supplier data to books.
Incorrect invoices and credit notes are flagged before they affect ITC.
Pending credit notes cannot sit indefinitely, so we track the next-period action.
Final pricing depends on GSTIN count, order volume, reconciliation depth and cleanup needs.
For sellers operating from one registration.
Custom/mo
For sellers with inventory or APOB in multiple states.
Custom/mo
Quick answers for online sellers managing marketplace GST returns, TCS credits, IMS and state-wise liability.
We manage returns, TCS credits, IMS actions and state-wise liability before the month locks.
