GST RELATING QUERY

U can skip Eway bill if total invoice value is less than 50 k

Invoice is necessary if movement of goods constitutes supply.

Bill of Supply required when it is exempt or under composition

delivery challan required if the movement doesn't constitutes supply.

and yes the transporter should have them even in case where e-way bill not required

Generating E-Way Bill is mandatory is incase of Inter State Supply if your "CONSIGNMENT VALUE" exceeds Rs. 50,000 as per Section 68 of the CGST Act 2017 read with Rule 138 of the CGST Rules 2017.

If your consignment value is less than Rs. 50,000, then you are not required to generate e-way bill. You can transport the goods via TAX INVOICE incase of Taxable Supply or BILL OF SUPPLY incase of Exempt Supply.

Yes invoice or delivery challan is mandatory for movement of Goods. it Depend on you for example 1) you have supply the goods below in 50000 this case invoice is mandatory for movement goods.Example 2 ) suppose you are transfer of goods for jobwork this case Delivery challan is mandatory for movement of goods.
and i also Aggre with Altamush Zafar ji

I want a suggestion, hand crafting sevice,
is it exempt from GST act ?
and code in GST, any judgement of high court, supreme court