1st AGM & 1st FY of New Company

No problem.

In accordance to Section 166 of Companies Act , Company may hold its first annual general meeting within a period of not more than 18 months from the date of its incorporation and if such general meeting is held within that period, it shall not be necessary for the company to hold any annual general meeting in the year of its incorporation or in the following year.  

And in accordance to Section 210 of Companies Act, In case of first AGM of the Company, to the period beginning with the incorporation of the Company and ending with a day which shall not preceed the day of the meeting (AGM) by more than nine months.

As your Company was incorporated on 8th Mrach 2011 and AGM was held on 3rd September 2012, so you have compalied both the Sections of Companies Act , to hold AGM of Company.
 

There is no violation at all in Companies Act  and Income Tax Act.