Can I upload manual invoices here.

Yes, you can srinavinfosystem.

Let me share information with you how importing invoices work. 

Upon importing your file, there are things that you need to know about what can be imported or not. These are the following:

• You can’t add discounts, credit notes, and negative amounts in general.
• You can import a maximum of 100 invoices at a time and 1,000 row limit per spreadsheet.
• You can import invoices with single or multiple line items.
• You can also import a large volume of customers and suppliers or products and services.

Once cleared, you can now prepare your spreadsheet and make sure everything looks good. You can take a look at what's required to import invoices link or download this sample spreadsheet, for guidance before importing. 

You may also visit this link for more information about the process when importing: Import multiple invoices at once. 

If you have followed up questions when importing, let me know by commenting below. I'm always here to answer it for you. Have a nice day.