if supplier not upload the invoice details for a particular transaction in their GSTR-1 then what to do ?

The Goods and Services Tax (GST) system in India requires businesses to file regular returns, including the GSTR-1, which contains details of all outward supplies made by the business. In some cases, a supplier may not upload the invoice details for a particular transaction in their GSTR-1. In such a scenario, the recipient of the goods or services can use the option of "Communication Between Taxpayers" on the GST Portal to request the invoice details from the supplier.

Here are the steps to request invoice details from a supplier through the GST Portal:

1.      Login to the GST Portal (www.gst.gov.in) using your GSTIN and password.

2.      Click on the 'Service' menu tab, and select 'User Services.'

3.      Under 'User Services,' select 'Communication Between Taxpayers.'

4.      Click on the 'Compose' button and fill in the necessary invoice details, such as the invoice number, date, and the supplier's GSTIN.

5.      Click on the 'Send' button to send the request to the supplier.

It is important to note that the recipient should only request invoice details for transactions where the invoice has not been uploaded by the supplier in their GSTR-1. The recipient should also ensure that all the details provided in the request are accurate and complete to avoid any issues in the GST filing process.

Overall, the "Communication Between Taxpayers" option on the GST Portal is a useful tool for recipients to request missing invoice details from their suppliers and ensure compliance with GST regulations.