Best Low Cost Tax Software for Share Disposals

I am a business owner and CIMA accountant who is potentially taking my corporation tax work in-house.  The main complexity in calculating corporation tax is c. 15-20 disposals of individual equities and/or equity/bond funds p.a. and the associated tax accounting for the gains/losses.  I use VT accounts and am looking for a simple low cost tax software that will integrate easily with VT and also easily manage the capital gains/losses with the share sales.  Any suggestions?