Want to pay returns for my firm

You mean to say  You want to file returns?  Question is not so clear to me. Rephrase or ask in Hindi no problem.

ITR 5 you need to file.

If it is properitory firm :

• ITR 3 (For individuals and HUFs having income from profits and gains of business or profession).
• ITR 4 (For presumptive income from Business & Profession)

if it is a partnership firm : 

• ITR 5 is applicable

ITR 5 return form can be filed with the Income Tax Department in the following ways:

Offline:

• by furnishing the return in a paper form
• by furnishing a bar-coded return

Online:

• by furnishing the return electronically under digital signature
• by transmitting the data in the return electronically and thereafter submitting the verification of the return in Return Form ITR-V

When the return is filed online, the assessee should print out two copies of ITR-V Form. One copy of ITR-V, duly signed by the assessee, has to be sent by ordinary post to Post Bag No. 1, Electronic City Office, Bengaluru–560100 (Karnataka). The other copy may be retained by the assessee for his record.

A firm whose accounts are liable to audit under section 44AB must compulsorily furnish the return electronically under digital signature.

Note that when the return filed on paper, the acknowledgement slip attached with the return form should be duly filled.

No annexures required

No document (including TDS certificate) should be attached with this return form while filing ITR-5. All such documents enclosed with this Return Form will be detached and returned to the person filing the return. Taxpayers are advised to match the taxes deducted/collected/paid by or on behalf of them with their Tax Credit Statement Form 26AS.