GSTR1 Report Exception in Tally Prime 3.0:

1. Identify the Exception:

Open Tally Prime 3.0.
Navigate to the GST Reports section.
Select the GSTR1 report.
Look for any exceptions or discrepancies highlighted in the report.

2. Common Exceptions:

Mismatch in Tax Amounts: This could be due to incorrect tax rates applied to transactions or manual modifications.
Missing Invoice Details: Sometimes, certain invoices might not reflect in the GSTR1 report due to various reasons.
HSN/SAC Code Missing: For certain items, the HSN/SAC code might be missing, which is mandatory for GST reporting.

3. Resolving Mismatch in Tax Amounts:

Navigate to the particular invoice where the mismatch has occurred.
Verify the tax rate applied and ensure it matches the GST rate for that particular product or service.
If there’s an error, correct the tax rate and save the invoice.

4. Addressing Missing Invoice Details:

Check if the invoice date falls within the reporting period.
Ensure that the invoice is marked as a GST transaction.
If the invoice is missing, re-enter the invoice details and ensure all mandatory fields are filled.

5. Adding HSN/SAC Code:

Go to the item master where the HSN/SAC code is missing.
Update the HSN/SAC code for that particular item.
Save the changes.

6. Revalidate the GSTR1 Report:

After making all the necessary corrections, navigate back to the GSTR1 report.
Refresh the report to see if the exceptions have been cleared.
If there are no more exceptions, you can proceed to generate the GSTR1 report for filing.

7. Backup and File:

Before filing any report, it’s always a good practice to take a backup of your Tally data.
Once backed up, you can proceed to file the GSTR1 report through the GST portal or any other preferred method.
Note: Always ensure that you’re working with the latest version of Tally Prime, as updates might contain important fixes related to GST reporting.

While this is a general guide, the specific solution might vary based on the exact nature of the exception. If you have a specific error message or issue, please provide that for more tailored assistance.