One assessee had paid tax after claiming ITC for the month of November, 2018 in GSTR 3B and filed the same on 31.12.2018 but the person has forgotten to file GSTR 1, which was filed later on 25.11.2019. now the department sent a notice that: since you have filed GSTR-3B return for the month of November, 2018 on 31.12.2018 ie after the due date as mentioned above ie 20.10.2019, you are requested to reverse the ITC amount. in the notice nothing mentioned about GSTR-1.
In my view since the ITC was availed with in the time hE is eligible eventhough he filed GSTR-1 belatedly on 25.11.2019
TaxTMI