Cellphones using the Android operating system and versions of iOS are compatible with this website. Please keep in mind that your document must be in PDF format. iPhones and iPads do not have the ability to house a pdf file, without use of a cloud drive. To file using an Apple device you will need to have a Dropbox, or similar, account set up. If you are unable to upload your document with your mobile device, you will need to file using a computer.
Other issues that mobile devices will encounter is that some touch screens are unresponsive to certain fields on the eFile website. Example: Unable to enter the birthday information.
The website is optimized for PC and laptops.