This forum has no access to your information or tax return. you have provided no information so there's no way to know what is best or in cases where there are options what is preferred. There's not any information to determine if "they" can even claim your kid/house.
several options
1) buy the desktop software and then you can run through as many scenarios as you like. this is not cost-effective with online. even this assumes no disagreements and conformity to the tax laws.
2) upgrade to a version of Live but here too there must be agreement and conformity to the tax laws
3) all parties consult with an outside professional who can provide advice and maybe help mediate in areas where there are disagreements.
