If you are legally married and living together there is no need for a Form 8332. You just need to decide between you who will claim the child on their tax return. The other party not claiming the child does not enter the child on their tax return as a dependent.
Why are you filing separately? That is the worst way to file when you are married and have a child as a dependent.
See this TurboTax support FAQ for filing Jointly versus Separately - https://ttlc.intuit.com/turbotax-support/en-us/help-article/taxation/better-married-couple-file-join...
