[A] In order to check it, go to reports module and search "Debtors"
[B] Now click on Debtors Info, a pop up will show up. Keep the filter pending as shown below and generate report.
[C] As we haven't chosen any specific company in the filter report will be generated for all the pending receivables.
[D] After the report is generated you can see the invoice wise receivable as shown below.
[E] If you wish to see overall company-wise receivable then just click on the button "Ungrouped Data" and select "Company" from the groupable column as shown below.