Reg advance tax payment

Dear Sir,

I  was an central government employee  superannuated in June 2019. Our office has not deducted any tax for the salary paid till June 2019. Now when calculate my income tax it is amounting to Rs 80,000/-  Can I pay the amount before submitting my ITR 1 form. I have not paid any advance tax.  will there be any interest for the tax amount which I pay now. please clarify.

Thanks and REgards,

Padma