Hi, you have started your preperation at the right time and if you continue studying till your exams no doubt you can clear easily with good marks. Regarding books I don't know about sangeet kedia but what I can suggest from my personal experience is go through atleast three past question papers either from Guideline answers or from any reference book or from scanners. Reading "Lesson Round up" at the end of every chapter helps you a lot. Though I suggest going through study meterial once for theory papers(which may help you to easily answer fill up the blanks & objective questions) if your reference book covers entire syllabus its more than enough. regarding Taxation paper I have referred bangar's book for my CA final and if you get his book for CS final too you can study from it.
Happy reading & All the best.