1.)The meaning of the term self occupied is inferred to be that the property is either occupied by you or your relatives(parents etc.) or is vacant and is not generating any income, however a let out out property is generating income. In this scenario quoting PAN or not by the tenant is irrelevant.
Thus the best practice as per law would be to treat a let out property as let out and offer the rent received as your income arising in India.
2.)On the basis of the judgement shared it is quite clear that it has been a contentious issue and no definite or exact amount can be considered as minimum amount which will be allowable to the assessee in the absence of documentary evidence for the cost of improvement incurred.
It is also noteworthy in the Judgment shared that the Department went into appeal against the A.O's order of allowing the deduction without documentary evidence and the matter was taken to Tribunal and thereafter to Hon'ble High Court which allowed deduction on the basis of probability theory and reasonable certainty.
To conclude no specific amount can be be considered that shall be allowed and it completely depends on the Assessing Authority's judgement and merits of the case .
3.) There is an option to update your residential status in the "Profile" section on the income tax portal which I have recommended to update.
4.)I would like to highlight the following in addition to the conditions stated above regarding the IT rules for borrowing of funds by an NRI,an NRI can only borrow funds from a RELATIVE subject to the following terms and conditions:
- ·The loan should be free of interest.
- ·Minimum maturity period should be one year.
- ·The limit of loan is US$ 25.000.
- ·The loan should be utilized by the NRI for his personal use.
- ·Loan amount should be credited to the NRO account of the NRI.
if the aforesaid conditions are followed than there shall be no future complications.