REGARDING ITR FILLING DATE

You can file ITR 3 up to 31 Oct. (or any extended date) u/s. 139(1) IT act. 

You can file before also, but better to get final statements, so that the ITR filing may not differ with audited reports specifically for shares/profits of partner.

You are welcome. 

"Due date" means,—

 (a) where the assessee other than an assessee referred to in clause (aa) is—

   (i) a company; or

  (ii) a person (other than a company) whose accounts are required to be audited under this Act or under any other law for the time being in force; or

  (iii) a partner of a firm whose accounts are required to be audited under this Act or under any other law for the time being in force [or the spouse of such partner if the provisions of section 5A applies to such spouse],

the 31st day of October of the assessment year;

(aa) in the case of an assessee [ including the partners of the firm or the spouse of such partner (if the provisions of section 5A applies to such spouse), being such assessee,] who is required to furnish a report referred to in section 92E, the 30th day of November of the assessment year;

 (b) in the case of a person other than a company, referred to in the first proviso to this sub-section, the 31st day of October of the assessment year;

 (c) in the case of any other assessee, the 31st day of July of the assessment year.