How to Calculate Landed cost of Purchase item, and what point should be taken in to consideration for that

Dear sir/madam

1.Our company is an advertising agency engaged in the activity of publishing ads in news papers.
2.publications are charging gst@5% of net taxable amount from us after agency commission .
3.In what way we have to bill to Client .
4.Weather we have to collect Gst @ 5% or 18% of Commission received to our agency or both
at preset we re giving bills to client as for example as follows:
Goss Bill amount 10000
Less Dis @10% 1000
Net amount 9000

Publication Gst 425
(10000*85/100*5/100)

Agency GST 270
(10000*15/100*18/100)
on Commission received

Total 9695
Please guide we on this issue.

Sir , I am existing taxpayer in Vat now I am migrated in gSt my gst no.& ARN NO. has been generated. Now I want to opt composition scheem but on Gst portel application for opt composition levi shows financial year 2018- 2019 how can I opt composition for 2017-2018.last date is 16 August. Thanks

IF A PERSON HAVING TURNOVER OF LESS THAN 75 LAKHS AND GETTING RENTALS FROM RESIDENTIAL PROPERTY CAN OPT FOR COMPOSITION SCHEME?

HSN CODE for tread rubber

Before filing Gstr3b we have to make payment but we are unable to make payment I have tried so many times. Pl give me suggestion

Whether cenvat credit of balance 50% on capital goods will be available under gst?In same year?

Dear Experts, we are paying tax and interest on unsecured loan, rent and commission. Those are more than 5k per day. will it applicable RCM

Can I claim the input credit of GST paid for insurance of car used in business or repair and maintenance of Car.

Plz let me know how I will account for the sales return in my books if I am selling my goods thru E commerce operator.
How I will prepare my GST return
Should I show the net sales or book the sales return thru debit note.