I'm new to Odoo, I've connected my bank account, which imported all transactions for the last year. Now I want to have a VAT and Profit tax report for the past year. 

#1 Do I need to go through the list of all transactions and reconcile them? Is it correct?

#2 If so, is there a way to do this in bulk? For example, to say "all transactions from Dropbox include 19% VAT"?

#3 How can I attach invoices for past transactions?

Thank you very much for the help.