How to File GSTR-1 from TallyPrime (2025 Guide): Online & Offline Filing, Validation, Error Fixing, and Step-by-Step Process

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GSTR-1 is the monthly/quarterly GST return in which a registered business reports all outward supplies such as sales invoices, credit notes, debit notes, and advance receipts.
TallyPrime simplifies this entire process by automating data preparation, error detection, JSON export, and direct online filing through Connected GST.

This guide explains how to prepare, validate, and file GSTR-1 directly from TallyPrime in 2025.

 1. Pre-Requisites Before Filing GSTR-1 in TallyPrime

Before filing, ensure:

✔ GST details are updated

• GSTIN
• Legal name & address
• State
• Taxability & GST rates for items/services

✔ Voucher classifications are correct

• Sales invoices
• Export invoices
• Deemed exports
• B2B / B2C breakup

✔ Internet connection (for Connected GST)

✔ Login credentials for:

• GST Portal
• TallyPrime Connected Services (if using online filing)

 2. How to Open GSTR-1 Report in TallyPrime

Follow these steps:

Gateway of Tally → Display More Reports → GST Reports → GSTR-1

Inside the GSTR-1 dashboard, TallyPrime automatically categorizes your outward supplies into:

• B2B Invoices
• B2C Large
• B2C Small
• Credit/Debit Notes
• Exports
• Advances

Each section has:

• Summary
• Detailed invoice view
• Error indicator (red/yellow flags)

 3. Validate Data Using TallyPrime’s Powerful Error-Checking Tools

TallyPrime highlights mismatches or missing information.
Common validations include:

�� Missing GSTIN of customer

�� Incorrect HSN/SAC

�� Incorrect tax rates

�� Invoice number issues

�� Mismatch in taxable vs. tax amount

Errors appear under “Uncertain Transactions” and must be corrected before export.

How to fix errors:

1. Press Enter on the error group
2. Tally shows the exact reason
3. Modify ledger/item/invoice
4. Revalidate

This ensures 100% clean, portal-ready data.

 4. Filing GSTR-1 via Connected GST (Online Mode)

(Available in latest TallyPrime releases)

This is the easiest method—no JSON download/upload needed.

Step-by-Step Process:

Step 1: Open GSTR-1 → Press Upload

TallyPrime sends consolidated return data to Tally’s GST server.

Step 2: Login to the GST Portal from the pop-up

Enter your GST credentials.

Step 3: Data automatically syncs with the portal

You can see:

• Section-wise status
• Invoice count
• GST amount summaries

Step 4: Preview the online JSON data

TallyPrime provides a portal-preview to verify before filing.

Step 5: File GSTR-1 on the GST Portal

Add OTP and submit.

 Benefit: No manual JSON upload. Faster, error-free filing.

 5. Filing GSTR-1 via Offline Mode (JSON Export)

If you prefer the traditional method or have unstable internet:

Step 1: Export GSTR-1 from TallyPrime

Go to:

GSTR-1 → Export → GST Returns → JSON Format

Select:

• Return period
• Company GSTIN
• Location to save file

Step 2: Open GST Offline Tool

Download from the GST website if not already installed.

Step 3: Import Tally JSON file into the Offline Tool

• It automatically validates the data
• Shows summary + section-wise breakup

Step 4: Generate JSON File for Upload

When validation is clean → click Generate File.

Step 5: Upload JSON on GST Portal

Use:
Returns Dashboard → GSTR-1 → Upload via Offline Tool

Portal shows:

• Uploaded invoices
• Errors (if any)

Fix errors in Tally → re-export → re-upload.

 6. How TallyPrime Makes GSTR-1 Filing Easier (2025 Enhancements)

✔ Real-time validation

Avoids portal rejections.

✔ Auto-tax calculation

Accurate breakup of CGST/SGST/IGST.

✔ Intelligent voucher classification

✔ Direct online filing

No JSON hassle.

✔ Exception reports

Helps fix missing GSTIN, HSN, tax rates, and mismatches.

✔ Multi-GSTIN company support

 7. Post-Filing Activities

After submitting GSTR-1 on the portal:

✔ Download GSTR-1 summary

✔ Compare portal vs Tally data

✔ Use TallyPrime GSTR-1 Reconciliation tool

• Track accepted/rejected invoices
• Track pending invoices

✔ File GSTR-3B based on GSTR-1 summary

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