While filing the return under GST, if any amount of tax or any interest on such tax remains unpaid, whether proper officer shall issue notice for recovering this amount

No, proper officer shall not issue any notice for such unpaid tax or unpaid interest on tax. This shall be recovered from such person in accordance with provisions of Section 79.

(ICAI FAQ PUBLICATIONS 06-09-2017 General provisions relating to determination of tax: FAQ NO.30)