No, child support is not tax deductible for the payer, nor taxable for the recipient. See IRS Publication 504 for details:http://www.irs.gov/publications/p504/ar02.html#en_US_2010_publink1000175957
No.
To be a claimed they must be in1 of 2 catagories:
Qualifying child
Qualifying relative
The tests to be "qualifying" would seem to not include that distant a relationship.
It is perfectly normal for a child to have two parents, so if two parents claim the same child, they could all live together and be a family. However, if the two parents in quesiton do not like each...
Yes this is possible that the qualifying child care expense that you pay to allow you to be able to work if you qualify to do this. Go to the IRS gov website and use the search box for Publication...