My employer withheld FICA taxes and generated a W-2 based on it.
I see the error and report it to them. Now they are refunding the FICA taxes and will issue a W-2c. They say you can proceed with filing taxes using old W-2 information for everything but the FICA taxes.
They say I should put 0 for social security and medicare in the tax prep software that they have provided, but I can still attach the old W-2 in the postal mail (which has non zero FICA) and need not wait for the W-2c, since the IRS anyhow does not administer social security and medicare taxes. Is it okay to have this mismatch between the W-2 copy I attach and the tax return form? (I am a non resident alien)