Common Doubts please clarify me CA club India persons

Dear CA Club India....

1.suppose I have 650 bills regarding sales invoices ,i want to upload all this bills in GSTR 1 portal .everybody telling just export the invoices ...But how to EXPORT the invoices to GSTR 1 ??? please guide me the above process steps?? how to do?


2.Rounding off in tally 

Automatic round off is available somebody telling....but I want to desire to know how to manually round off the figures

sales @ 18% RS 56,789.53
CGST @ 9%. 5111.05
SGST @ 9%. 5111.05
total. ___________
67011.63
___________

now I want to need the invoice amount need round off 67011 ..so here what is correct round off I have to put?? plse guide me