The requirement to file a tax return in based on the amount of your income, not how long you worked. Even though you only worked two months, you probably made enough that you have to file. You can use the calculator at the following link on the IRS web site to see if you have to file a tax return.
Do I Need to File a Tax Return?
Even if you are not required to file, you should fill out a tax return to see if you would get a refund. If you are entitled to a refund, you will want to file even if you are not required to, in order to get the refund.
