Ability to access VAT returns and submit them has disappeared.

Ability to access VAT returns and submit them has disappeared.

I have been using Zoho books successfully to submit quarterly VAT returns. Without reason I have lost that facility. I have followed all available instructions eg going into settings, taxes, VAT etc. without success.  My registration number is there and it appears to be activated but on my home screen there is nothing that allows me to submit a return as before. I can still enter invoices with appropriate vat extracted. Any ideas? thanks

    Nederlandse Hulpbronnen