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Filing GSTR-3B

Overview

GSTR-3B is a monthly self-declaration return in which taxpayers report their summary of outward supplies, inward supplies, input tax credit (ITC), and tax liability. It must be filed even if there are no transactions during the period. The return helps the government collect tax on time and ensures accurate ITC claims.

Preparation of GSTR-3B in Octa GST

Once ITC is reconciled in Octa, the preparation of GSTR-3B becomes simple and convenient. To prepare GSTR-3B, every taxpayer needs to perform three key calculations:

  1. Outward Liability – Calculation of tax payable on outward supplies.

  2. RCM Liability – Calculation of tax payable under Reverse Charge Mechanism (RCM).

  3. ITC Claimed and Reversal – Calculation of eligible Input Tax Credit to be claimed and any ITC that needs to be reversed.

Octa GST automates and organizes these steps, making the filing of GSTR-3B faster, easier, and error-free.

Outward Liability

Outward liability refers to the tax payable on outward supplies (sales or services provided) made during a tax period. It includes IGST, CGST, SGST/UTGST, and cess that a taxpayer is liable to pay on taxable supplies reported in GSTR-3B.

How to fill Table 3.1 Details of Outward Supplies and Inward Supplies liable to Reverse Charge

Step-1 Outward taxable supplies (other than zero-rated, nil-rated and exempted)

  • If we prepare GSTR-1 from octa that the Outward liabilities calculation automatically calculate in octa and if the GSTR1 is not filed using octa that we have to import GSTR 1 data in sales tab for that we have to follow the steps:
  1. Import GSTR-1 in octa (Follow steps Given in GSTTR-1 Report)
  2. After import the data in Octa we have to export the gstr-1 for that period and the same file can be imported in sales tab.
  3. for import the data navigate to sales tab, click to import and select the file which is exported.
  4. After import navigate to Prepare GSTR-3B and click to calculate button to check the data

Step-2 Cross check of outward liabilities Amount with auto calculated GSTR3B

Now after importing the data we have to cross check that auto calculated GSTR-3B or Octa that is there is any difference after filing of gstr1, and the difference can be possible if any credit note and downward Amendments are rejected by the customers.

if any difference shown by octa in red colour we have to check the IMS status of outward document in GSTR-1 reports.

after checking the outward difference and you want to uprate the amount calculated by octa that you can click edit button for update the amount.

Step-3 Inward RCM liabilities

For adding the Inward liabilities in octa, we can insert that liabilities at invoice level to do that, we can import purchase register for RCM document and the amount will calculate by octa automatically from purchase data.

Now the Table 3.1 is completed and for next outward liabilities of table 3.1.1 we can use edit button to fill the amount.