That was poor advice. The child can only be claimed on one tax return since all of you live together. Your partner should amend and remove all mention of the child from her return if she is not claiming the child. There is no "splitting" of the child-related credits when you all live together, so using 8332 is not appropriate. If you are the higher earner and are claiming the child, then your own return claiming the child can be filed by mail since all attempts to e-file with the child's SSN will be rejected.
Or......there is another possible solution:
GET IP pin in order to e-file if your dependent’s SSN was claimed on another return
https://www.irs.gov/newsroom/irs-takes-steps-to-help-prevent-refund-delays-by-accepting-duplicate-de...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
