You can file Form L-1 on paper if you are not mandated to file electronically. To file on paper, you may use the Form L-1 that was mailed to you, the version available on our website, or one that is printed through approved third-party software. If you want to file electronically, you can through LDR’s online service, Louisiana Taxpayer Access Point (LaTAP) Louisiana Taxpayer Access Point (LaTAP) or approved third-party software.