Rehan Sanjay Venkatesan

GST Tools Developer

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About me

  Member Since : 22 February 2026  (Chennai)

I'm Rehan, a software developer from Chennai. I built invoicecheck.in after seeing too many small business owners and sellers lose payments due to simple GST invoice errors that could have been caught in seconds.

As a developer working closely with businesses in Tamil Nadu, I kept seeing the same problems — wrong GSTIN, CGST/SGST applied instead of IGST, incorrect HSN codes — causing GSTR-1 rejections and marketplace payment holds.

So I built a tool that validates 15 GST compliance rules in 15 seconds. Not to replace CAs — but to be the first line of defence before a CA even looks at the invoice.

If you're a CA or business dealing with invoice errors, try it free at invoicecheck.in. Always happy to connect and get feedback from the CA community.

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CCI Pro

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