We need to claim our grandchild on tax return from 2017. We are doing an amendment because we did not have her social security number. My daughter did file the year before and I would guess she had to have my granddaughter's S.S.# in order to file for the previous year. I am POA as my daughter is in jail and my granddaughter is social security card is way gone. What form can I have my daughter sign so we can retrieve my granddaughter's social security number from my daughter's tax return for previous year. I do know my daughter's social security number. But they tell me even though I'm POA she needs to sign "this form". Which form is it?
