Please advise any services from unregistered person comes under gst reverse charge or not

Dear Sir,
I want to know that a trader deals in Computer and office stationery and computer job work i.e. printing work, online bill payment, etc. he is want opt composition scheme 1%. but ration of his trading and job is 75:25. In this condition can he opt composition scheme 1%.
Thanks

Is it required to take registration in gst for shopkeeper selling MRP goods (Turnover exceeds 20 lakhs)?

If a company hires any retainer under a contract and the retainer is not registered under GST then is the company liable to pay GST under RCM?
Also, if a company avail the services of freelancers who are also not registered then would RCM become applicable? Going by a hypothetical number say 500 freelancers in a month.

Pls let me know the HSN code and gst rate on flex board and glow sign for shop.

If a company hires any retainer under a contract and the retainer is not registered under GST then is the company liable to pay GST under RCM? Also, if a company avail the services of freelancers who are also not registered then would RCM become applicable? Going by a hypothetical number say 500 freelancers in a month.

what if any existing taxpayer utlized all his ITC in Vat & now he want to pay GST under composition levy ? is he required to pay amount equal to VAT on existing stock?

Sir, I am having fertilizers and seeds retailer shop in my home town. When I am trying to register for the GST, in the goods and services coloumn, it is asking HSN CODE of our nature of business.. So please suggest to me, which Code is suitable for my business? This products are mainly used by farmers for agriculture purpose only.

Will the rate of 12% applicable on loose Potato Waffer and basic good in potato chivda ( Not salted ) ??? Packing is in 20 kg bags.

Dear Sir,

Kindly guide me for HSN Code and taxable rate for GST for Event Management service in India.

Thank you.