A GSP providing tax accounting software will have the advantage of already providing the tax payer with a vast majority of the taxation functionality. It will help the tax payer if the delta process of upload of the invoice/ return and reconciliation of the same is also provided by the GSP. Whereas in case of GST portal, another set of exercise manually or otherwise will have to be done to upload the invoice data or the return. The interface and features exposed by GST portal will be uniform for all taxpayers and might be basic in form and design. On the other hand GSPs are expected to have richer interfaces and features required by specific group (large taxpayers with completely automated financial system,SME with semi-automated system and small size with no system) of taxpayers. Also, by sheer size the GST portal will not be as nimble as that provided by a GSP.
GSPs can come up with application to provide GST filing facility in existing software or develop end-to-end solution for SME and small taxpayer to manage their sale/purchase and GST filing e.g. an offline utility like spread sheet, which taxpayer can fill their invoice details and then upload on GST portal for processing. Similarly, for Tax Consultants (TC), GSPs can provide dashboard to display list of his/her all clients and clicking on a particular client can give TC the snapshot of the actions/ pending actions by client. GSPs can provide innovative/value added features, which would distinguish them with other GSPs in the market.