Thanks for the clarification, @talk2khurram.
The steps above provided by my colleague @ZackE is the best way to export your Budget FY2021.
In QuickBooks, exporting files through IIF Format is only available to the latest year.
Let me share this article about IIf import and export limitations: Export, import, and edit IIF files.
I also added a link to learn more about managing your QuickBooks account: Help articles. I’m sure you’ll find it helpful.
You’re always welcome to post in the Community whenever you need help. I’m just right here. Have a good one.