Please keep in mind that the tax returns are strictly personal and depend on multiple various details, including, but not limited to- Visa type, country of residence, income earned, tax withheld, residency status etc.
Your personal situation is most likely not exactly the same as your friend’s situation, or your friend may have completed the steps differently so the system generated a different return.
Please be aware that even if you both worked in the same state, for the same employer etc., that does not mean that every single thing would be the same on both' tax return.
If you have any doubts though, you can always go back through the steps and make sure you have filled the information correctly and if you have any questions, you can always contact us via our live chat.