Every partner has to file the individual returns. The profit of the partnership firm is exempted in the hands of the partners. The due date for filing the return for individual is 31st July for every year. However, you can file the return till the 31st March i.e. within a year after completiton of the year without any penalty, but interest on tax payable is required to be paid. One person can file the return upto next two years. However, the penalty of Rs. 5000/- for late filig of return may be asked by the department to pay. \
In my opinion, you should take the fast steps to file the return for the year ending 31.3.2007 before 31.3.2009, so that the due date should not lapse and also file the return for the year ending 31.3.2008 immediately. So that, in the next year, you will have the advantage of 3 years returns for obtaining any loan.
You also needs to show the firm's balance sheet and p&l to the financers for obtaining the loan otherwise the financers/bankers may object on your filing of returns at a time for the intention of obtaining the loan.
You may file the return anywhere in India, there is no need to file at Rajasthan only. But it will be better to modify the PAN details i.e. address ( you may also do it after the filing of return also).