contact the manager at the TACO Bell location you worked at
since you'll have to paper file, your going to need an actual copy of the W-2 so if the employer doesn't provide it you'll have to get a copy from the Social Security Adm.
FYI w-2's are supposed to be out by around 1/31 of the following year. the time to call your employer if you don't get it is maybe a week later because most are mailed out. some employers may not mail out copies but furnish a link to download it.
if that TB location was paying you under the table (meaning it wasn't reporting the wages to the IRS) then the SSA will not have a copy. if this is the case report back in this thread.