Power Query Post

[Anonymous]

Hello! I'm very new to Power Query, I searched for a few solutions, but haven't really gotten nowhere.

What I'm trying to do is get the main table from this site (don't worry it is from the brazilian government): https://cvmweb.cvm.gov.br/SWB/Sistemas/SCW/CPublica/CDA/CPublicaCDA.aspx?PK_PARTIC=172817

The issue is there is a dropdown menu and the standard date that I get is the most recent one. I need to change that date for 3 months ago.

From what I gathered using Postman, the variable that I need to change is ddCOMPTC, but I'm not really sure how to do it. The code I'm trying to work with is this (but maybe I'm doing it completely wrong):

let
    Content1 = "108123873",
    Fonte = Json.Document(Web.Contents("cvmweb.cvm.gov.br/SWB/Sistemas/SCW/CPublica/CDA/CPublicaCDA.aspx?PK_PARTIC=172817", [Headers=[#"Content-Type"="aplication/x-www-form-ulrenconded"], Content=Text.ToBinary(Content1)]))
in
    Fonte

[Anonymous]

The URL you request does not result in a JSON document. You can use F12 in any modern browser to look at what sources are requested. (use the network tab and press F5 to refresh)