I am rasident of daman and diu I want portuguese passport kindly inform me what documents I require where to apply and can I complete all these procrrdings within two three months

You should contact the nearest Portuguese consulate with all the paperwork you have.

Hi, siya_hansraj!

You might also want to check out information that you'll be able to find via clicking on the following link to a thread on this site.

https://www.askmehelpdesk.com/visas-passports/portuguese-passport-information-read-me-28679.html

Thanks!