Software for Accountant

I'm looking for an actual Software for me to use as an Accountant and not for Client base or for Bookkeeping ! I need a software that'll do the following Balance Sheet, P/L, Vat returns, Corporation Tax, Purchase Ledgers, Sales Ledgers, Banking, Payroll, E-Learning Payments etc.
My client has just started his business but will grow next year, I am looking for an software that will grow with the business.

What is the best software for an Accountant?

Thanks in advance