GSTR 1 Return..

GSTR 1 have total 11 tables to be give certain inputs data what ever require.

my query is as below

B2c Small Invoice (Below Rs 2.5 Lak invoice value) uploading not accepting Multiple rate of tax in single invoice while uploading data..

example..Invoice contains 18% tax and 28℅ tax supply of goods Item..while uploading invoice data in to GSTR 1 its accepting only one rate of tax..

How can I submit...this invoice in GSTR1....Please suggest..