So it is possible to go back to file and or amend returns with the itin to file jointly and claim the child tax credit based on the situation presented? Is the child tax credit higher for filing jointly with itin holder vs. Filing singlenorbhead of household? Is it past the deadline for 2019-2022 childbtax credits? Can you specify which years are still able to claim if infile and or amend jointly with spouse that has an itin
