Error while importing your file
Error - "2018-10-20" is not a number -- You will receive this error due to in correct column mapping while uploading purchase invoice.
This error will occur if the columns are incorrectly mapped
On the Upload Purchase Invoices XLS page, upload the XLS document and choose the correct XLS Data Format based on your file.
Click on Upload Purchase Invoices XLS File
Under Fields for Invoice details, choose the right column for Supplier GSTIN, Invoice Number, and Invoice Date.
Choosing Invoice details