All transaction entry would be there
Payments > Transitions, you would able to add income, expense, transfer entry on that page.
To see existing invoice, create new invoice entry, print invoice, download invoice as pdf, mail invoice to customer - you would able to do each of these task there
Payments > Transitions
A menu item link direct to new invoice creation -
Payments > Create Invoice
Create an invoice with recurring way -
Payments > Recurring Invoice