CA Question: How Do You Handle E-commerce Client Invoice Rejections on Amazon/Flipkart?

Softwares 515 views 2 replies

Rehan Sanjay Venkatesan

GST Tools Developer

31 Points Joined February 2026

Fellow CAs,

Quick question for those with e-commerce seller clients (Amazon/Flipkart/Meesho):

How often do your clients call you because:
- Their invoice got rejected on the seller portal
- Payment is on hold due to "GST mismatch"
- They don't understand what's wrong

And how do you currently handle it?

In my practice, this happens 2-3 times a month. Client uploads 50-100
invoices, 1-2 get flagged, they panic.

Most common errors I see:
1. CGST+SGST used for interstate sale (should be IGST)
2. Tax calculation wrong (rounding errors)
3. CGST ≠ SGST (they must be equal)

Takes me 1-2 hours to manually review and explain.

Curious:
- Is this common for you too?
- How do you bill for this (emergency call-out vs included in retainer)?
- Any tools/checklists you use to prevent this?

I'm working on a pre-validation system clients can use before upload
(saves them holds, saves us reactive work). Would that be useful in
your practice?

Looking forward to hearing your workflows.

Replies (2)

Aashok F C Advisory

Finance & Compliance Consultant | FP

357 Points Joined January 2026

Invoice rejections are a systemic pain point in e-commerce practice, costing CAs hours of manual "investigative" work. Most firms are moving away from inclusive billing toward incident-based or tiered fees to manage this. A pre-validation tool that acts as a "sanity check" for clients before they upload data would significantly reduce friction and save "blocked" payments.

Rehan Sanjay Venkatesan

GST Tools Developer

31 Points Joined February 2026

Hi Aashok,

Exactly right — the incident-based billing model shift you mentioned
is what I'm seeing across the board. The reactive nature of invoice
reviews creates friction for everyone involved.

That's why I built the pre-validation system — it acts as that "sanity
check" you mentioned. Clients self-check in 60 seconds before upload,
which eliminates the emergency escalations entirely.

The tool catches the 3 most common errors that cause payment holds:
1. Wrong tax type (CGST vs IGST for interstate) — 67% of holds
2. Tax calculation mismatches — 22%
3. GSTIN format issues — 11%

I'm doing free validations to show what it catches in real invoices.
Would you be open to me running 3 sample invoices? I'll show you the
exact output — what errors it flags, how it guides users to fix them.

No obligation — just want to validate (pun intended) that it solves
the friction point you identified.

Happy to do a quick 15-min call or email exchange if that's easier.

Regards,
Rehan
InvoiceCheck.in