one thing to be aware of is that if you are not a legal resident of citizen, they wont take your money.
they will tell you that you owe it, and they will charge you interest if you dont pay it, but they will not allow a foreign citizen with only a tourist visa to pay.
We use an accountant, and, much like a garantia, she must file a signed statement by a Buenos Aires property owner with the bienes forms.
Then, you can pay.
I pay all at once, in one payment, and get a discount from the five payment total.