We have a website, is we are ecommerce operator? or not?

Yes selling online comes within the ambit of e commerce.

if you sales goods and services through it than yes....but if you just have a website for info sharing or advertising yourself, than no....

Could you please resolve the below questions?

Basically, We have a website and selling items through website.

In this website we are using Third party payment gataway limited(Eg.CC Avenue). If we sell the item in Website, that money goes to Third party(Sundry Debtor).

This thrid party member send the money to our Account after 1 week. 
Eg. Item Cost: 1000/- Goods IGST(5%): 50/- 
Total: 1050/-(This amount paid by Customer to CC Avenue) But CC Avenue took some amount from the above amount.
Per Example they Charged 50/- and 18% Service Tax(IGST 18%). Total They charges 50/-+ 18% of 50/- So 50/- + 9/- Total: 59/- And finally I get 1050 - 59/- = 991/- from CC Avenue to my bank. 

How to treated above example in Tally ERP 9( With Goods IGST 5% and Service Tax IGST 18%.

Please help me if anyone expert inTally ERP 9 GST.

Thanks in Advance.  

Read more at: /forum/how-to-pass-third-party-payment-gateway-entries-in-tally-erp-411441.asp

just visualise them as two separate transaction...it will be easy........
1. sale transaction -
CC avenue a/c Dr 1050
to sales a/c. 1000

sorry for incomplete reply-

1. sale transaction
CC avenue a/c Dr. 1050
to sales a/c. 1000
to output gst @ 5%. 50
2. charges due -
collection charges a/c Dr 50
input gst @ 5% a/c Dr 9
to CC avenue a/c. 59
3. finally payment received
Bank a/c Dr. 991
to CC avenue a/c 991


wherever I have mentioned gst, please make two entries of cgst and sgst or one entry of igst, as the case may be..