You can export your character sheet from two places on D&D Beyond.
The What's Next section of the builder.
The bottom of the Character Menu on the digital character sheet. Click Manage near the character's name to open the menu, and Export to PDF is at the bottom.
This will launch a form-fillable PDF that should be familiar to everyone that includes all the details for your character.
You can then update or tweak anything you desire before printing.