Thank you for posting here in the Community, @Leandro I Braslavsky Soldi.
I'll point you in the right direction for support with your query about backend access.
We have a separate support page for your specific concern. Check out this page: Intuit Developer Support. Click on the QuickBooks Desktop (QBDT) box, then press Ask a Question.
You can also move to the Articles tab for additional help on Intuit Developers.
Don’t hesitate to reach us again if you have other questions while managing reports in QuickBooks. It'd be my pleasure to help.