Quotations : Prepare as Estimate/Quotations for your clients with TAX amounts.
Invoices : Create Invoices with single invoice or recurring invoices with TAX amounts.
Recurring Invoice : Recurring invoices can scheduled as Weekly/Monthly/quarterly/Yearly etc. It will be created automatically with no hasle.
Customers : Add/Edit customers details easily.
Products : Add products easily. Possibility to add product level different/additional TAXES.