When you are applying for a tax stamp using the ATF's eForm website with a gun trust, you will need to upload a copy of your gun trust. Many times, we get questions about where you upload a copy of your gun trust to in your account profile. The ATF doesn't have a section under your account profile to upload a copy of your gun trust to. Your gun trust, when applying with a gun trust, will be uploaded to each eForm tax stamp application under the electronic documents section of the eForm tax stamp application.