For Taxation: Practice calculation of taxable income of a salaried individual. Income Tax by Muhammad Muazzam Mughal
And just go through some relevant sections from IT ordinance.

For auditing: Read 4 S series Pettiwala: 1) Auditing for B.Com
Auditing is very easy because some key questions are repeatedly asked.

There is nothing in these subjects which could be general. Both of the subjects are to the point, koee jagha nahi kahani dalni ki yahan.