My partner has passed away but there are still amounts being debited. How is this possible?

Did your partner give permission for payment in instalments by direct debit?

Then GBLT will automatically debit the instalments until the tax assessment is settled in full. The municipality will notify us automatically of your partner's passing away. In your situation:

the old tax assessment in your deceased partner's name will be reviewed and possibly reduced. You will be notified of this in the name of 'the heirs of';
you will receive a new tax assessment for the remaining number of months of the year.