GST Exemption For Transport Services (Non GTA)

Table 5 is for exempt/nil rated and non GST inward supplies. so ideally any outward supplies should be shown in table 3.
moreover transport services are as such taxable under gst provided it is not covered under RCM or under exemptions u/s 11 of cgst act.

Villas Bhai,
One of our customer is asking us to provide Zero GST Invoice, we are not GTA so, we will not able to show GST under RCM in the Invoice. In this case how so we manage the customer requirements as well how we show this transactions in the GSTR1 & 3B. Showing NIL Returns isn't fair because this is continuing businesses for long term.
Monthly turnover is about 5 Lakhs .
please assist me accordingly.