Businesses can start uploading their sale and purchase invoices generated post-July 1 on the Goods and Services Tax Network (GSTN) portal from July 24, a top company official told news agency PTI.

"We plan to launch the invoice upload utility on the portal on July 24 so that businesses can come forward and start uploading the invoices on a daily or weekly basis to avoid month-end rush," GSTN Chairman Navin Kumar told PTI.

The Goods and Services Tax kicked in on July 1 and so far, the GST Network, the company handling the IT backbone for new tax regime, has been facilitating registration of businesses.

Generating invoices for dealings above Rs 200 and maintaining invoice records with serial numbers, even if maintained manually, are prerequisites for claiming input tax credit under the GST regime.

While uploading invoice on the GSTN portal, a business would need to mention the invoice number and date, customer name, shipping and billing address, customer and taxpayer's GSTIN, place of supply and HSN code. Also, the taxable value and discounts and rates of CGST, SGST and IGST would have to be filled, along with item-wise details like description, quantity and price.

GSTN had last month launched an offline Excel format for businesses to keep their invoice records, and from July 24, this Excel sheet can be uploaded on the portal.

Kumar said GSTN would put up a video on its portal to assist businesses in uploading invoices.

Besides, a call centre help desk has been set up to assist taxpayers regarding any query they might have about the new tax regime.

"We have been reaching out to trade and industry associations telling them that those who have about 10,000 invoices a day, they should upload it on GSTN portal on a daily/weekly basis to avoid last moment rush," Kumar told PTI.

So far, over 69 lakh excise, VAT and Service Tax assessees have migrated to the GSTN portal and nearly five lakh new registrations have happened under GST, the PTI report added.

Under GST, which is a single tax in place of multiple central and state levies like excise, service tax and VAT, businesses are required to upload on GSTN portal invoices of their trade every month.