> ## Documentation Index
> Fetch the complete documentation index at: https://www.aiaccountant.com/help/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshooting GST reconciliation

> Fixes for portal authentication, mapping, and results that do not look right.

## The OTP is not arriving

The portal sends the OTP to the mobile number registered against that GSTIN. Check that the **Username** entered is the portal username for the same GSTIN, then click **Request OTP** again. If you cannot use OTP at all, download the 2B from the portal and use **Upload GSTR-2B** instead.

## My GSTIN is not in the list

Click **Add New GSTIN** in the setup panel. Several GSTINs under one PAN can be added. It is a one-time setup.

## The purchase register columns are mapped wrongly

Review the mapping before saving. Check the header row, the voucher type for that file (Regular, Credit Note, or Debit Note), the field mapping, and the date format. Each file is mapped separately.

## Rows are missing from the reconciliation

Rows with zero tax value are excluded automatically. If other rows are missing, check the header row setting and whether the file was included in the Upload Summary before you clicked Import Files.

## Everything shows as Missing in 2B

Usually one of three things: the return period does not cover those invoices, the 2B fetch did not complete for those months, or the GSTIN on the reconciliation is not the one the purchases were booked under.

## Everything shows as Missing in PR

Your purchase register did not import, or the file holding those purchases was left out. Check the Upload Summary listed every file as Ready before import.

## An AI Match looks wrong

AI Match and AI Probable Match allow small differences in invoice number, date, or amount, highlighted in red. Open Invoice View to compare the 2B line against your books line, and set the action accordingly, or match it manually.

## Table 4 in the export looks incomplete

Table 4 is built from the actions you set on invoices. Invoices left on **No Action** carry no classification. Set actions in Invoice View, then export again.