What to do with my PPF account, completed 20 years with it?

[Master]

I have completed 20 years of my PPF account (20=15+5; with one extension of 5 years). Now I still want to continue investing in PPF. Please suggest if –
1- Can I extend my old PPF account to another 5 years?

Yes, You can. After the PPF account has been in operation for 15 years, it can be extended for a duration of 5 years at a time. This extension can be taken any number of times and there is no limit on how many times a person takes this extension.

2- Or do I need to close my existing PPF account and open another PPF account for 15 years?

Answered above

3- Am I eligible to open another PPF account (after closer of first one)?

I think you can, but I am not sure. That you can you open another PPF account after closer of first one.