Itr form

If you intend to continue with tution income then show your income as Profit or Gain from business or Profession(PGBP) As it will help you to claim expenses against your income in future where your income will go on increasing. 

If its one time transaction then either treat it as PGBP or income from other sources.

You can opt for Presumptive income depending upon your Gross Receipt during the year and file ITR-4