Read the invoice number from regular field either read cell or read range and get the invoice number
read the line item to datatable
Add column to Datatbale with columnname Invoice_no
Refer below to move column to 0 index position
https://forum.uipath.com/t/how-to-move-column-from-index-0-to-index-10-in-datatable/137583/3
if the invoice no is same for all the records
use assign activity in to field use Dt.Columns(“Invoice_no”).Expression and in Value field give invoice no
otherwise you have use either for each and use assign activity to set the value
Regards
Anil_G
ashokkarale
A_Learner
Ritaman_Baral
Rule_Outlaw