Ppf: forgot to contribute

Hello,

I normally contribute 1.5 lakhs per annum to my PPF account at the Post office. 

For FY 18-19, I forgot to do this, and my account is now de-activated. 

If possible, I would like to rectify this by paying some small penalty to reactivate the account, and contribute 1.5 lakhs now (in April 2019) for FY 18-19. I will later contribute 1.5 lakhs again, for FY 19-20. I don't mind that I can't take a 80c IT deduction for FY 18-19, I would still like to make the contribution to the account. 

Is this allowed? 

Thank you