Find this add-in under the CREATE menu as "Save DXF for Laser Cutting"

If you do not see this add-in under the CREATE menu click: Scripts and Addins  >>>  Add-ins >>>  Select "DXF4Laser"  >>>  hit "Run"

Set your KERF width in the dialog and pick a plainer face of a body to generate a kerf compensated DXF file for. The higher your Kerf setting the tighter your parts will fit together. Using the 60W epilogue laser I have access to I use 0.20mm kerf for small designs I want to pound together cut from 5mm wood and go down to 0.10mm for larger works I want to be able to dry-fit and disassemble before gluing. 

The right kerf setting to use will vary by your material and laser settings. You can either experiment with various settings or cut a test pattern - e.g. cut 10x 5mm wide rectangles, set them side by side and measure the total width then calculate your kerf. I find it helpful to flip every other tile over as laser cuts always have a little bit of a taper to them and this helps average things out. Example: if your total width was 48.5mm then your ‘perfect fit’ kerf is (50 - 48.5) / 10 = 0.15mm

Tip: Use https://a360.autodesk.com/viewer to view your DXF files.

Install:

The installer that ran when you downloaded this app/plug-in from Autodesk App Store has already installed the app/plug-in.

OR, simply double-click the MSI to install the app.

Uninstall:

You can unload the add-in without uninstalling it by clicking the "Stop" button when the add-in is selected in the list box on the "Add-Ins" tab of the "Scripts and Add-Ins" dialog.

Unchecking "Run on Startup" causes the add-in not to be loaded in future sessions of Autodesk® Fusion 360™.

To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button.

OR, you can uninstall it from 'Control Panel\Programs\Programs and Features' (Windows 7/8.1/10), just as you would uninstall any other application from your system.

Non-manifold shapes (ones where cutouts share an edge - e.g. two square cutouts sharing a corner) are not supported.

If the top level component is not the active component and you are generating a DXF for a deeply nested, and transformed, component the generated sketches will not correctly overlay the selected face.