Does restaurant has to pay GST on food being sold through ecommerce operator?

Turnover for Dine In - Rs. 8 lakhs

Turnover through Zomato - Rs. 14 lakhs

Total turnover - Rs. 22 lakhs, now 5% tax to be paid on what turnover?

Show it in GSTR-3B 3.1.1 (ii).

A new table has been introduced

Whether 5% GST has to be paid or not on Zomato sales?

GST will be paid by Zomato. You will just need to disclose in the above mentioned table

Since january 2022 to June 2022 i have shown in taxable supplies and paid 5% tax on it... Now how can i rectify it?

You will have to claim refund under excess payment of tax

Should i claim refund or can i amend GSTR 1 and reduce the liability in GSTR 3B of the July 2022 month?

You can do that also if you have tax liability to adjust. 

yes, i have tax liability....

So where to declare sales made through zomato in GSTR 1 of restaurant? which table can u please guide?

Can someone please share me offcial G.O which says how to show sales 

How does RCM comes into picture here?

LETS EXPLAIN IN DETAIL E COMMERECE OPERATOR MODALITIES

1.

PERSONS WHO AE SUPPLIER OF SERVICES AND SUPPLYING SERVICES THROUGH E COMMERCE OPERATOR ARE NOT REQUIRED TO REGISTER UNDER GST IF AGGREGATE TURNOVER LESS THAN 20 LACS. PER ANNUM