exporting gstr1 from tally

sir generate jason file . you can directly upload Jason file. even that excel format is valid you can copy paste the excel in off line utility

without name of b2b parties?

yessir

Yes...
Name are not appeared... It's based on GSTIN only... Also check the Customers GSTIN....

In Tally..create the json file for GSTR3B GSTR1 and GSTR2 and upload the same in GST portal on offline mode by choosing the created json file .. its very very easy for GST filing...

some mistake of direct Jason file upload in gst portal
if you entered purchase party credit note in use debit note voucher
in your Jason file uploaded in document summary sale voucher summary + debit note summary.when that debit note not part of gstr1.
so use care full in gstr1 document summary debit not summary manually will may be delete
be careful of direct uploads tally erp9 Jason file
I face this problem
I deleted manually debit note document summary

Not only debit note please cross check all tabs of gstr1 after uploading data from tally before submitting