Once you file the returns, the invoices will automatically populate in the GST portal,If the invoice is not reflecting on
the GST Portal even after successful generation in BUSY,you can check these thing:
Step 1:Go to Display menu,
Step 2:Select GST Reports,
Step 3:Select GST Returns,
Step 4:Please open the report for which you are generating the return,select filing frequency,weather monthly or quarterly,check here your data is showing or not.
Step 5:If data is showing properly there and return is showing successfully generated from BUSY, then you will need to go to the GST Portal and refresh your portal,
Step 6:You can check also GST Portal should be Login as GST number which is in mention in BUSY.