Hi @Anil
If your VAT is calculated outside of QuickFile, you would need to use the bridging module to remain compliant with MTD. There’s a guide for this here: VAT Bridging
With bulk invoices, you could either enter them in bulk (see this guide: The multi-invoice entry form), or you can import them from a CSV file (see here: Importing sales and purchase invoices)
Hope that helps! Please let us know if we can help further 