GST for bricks manufucter

sir,

Am one of sand seller in tamil nadu in Gst  rate of tax. some clarificatio to be need.

1. In gst what percentage cover.

2.  In quary purcahse tax collect or not bill not issued, what type of form upload  in SGT

3   Am collected tax from our party what type of annex upload?

4.  If you send one model tax invocie to us much better.

5.  without purcahse tax  what of type returns submitted in gst?

To be advice me. by mail  annchidam_99 @ yahoo.com

Thanks & Regars.

Venkatesh.