This is a public forum with no access to taxpayers' data. Turbotax cannot supply you with info about another taxpayer's return, that would be a violation of the tax laws. Nor will the IRS for a non-joint return. If things are that bad see a lawyer. generally. a joint return produces the lower combined taxes and there's a way to file so each gets there share of any refund. if you conclude you want to file separately do so. Eventually the IRS will get around to figuring out what the proper reporting was.
two people claiming the same dependent requires the second to file by mail.
when parents file separately there are various rules to determine who can claim their child dependents.
you can use this IRS website to check
https://www.irs.gov/help/ita/whom-may-i-claim-as-a-dependent
