I am separated from my husband but move back in with him b/c is is very ill . Do I file him on my taxes. I pay his bills(all) and he is retired. He is unable to take care

[f2db24dde177]

Of himself. Dish. Failure to thrive. In and out of Hosp and I’ve missed lots of days off of work. He has not filed taxes since he moved to Georgia

[xmasbaby0]

A spouse can never be claimed as a dependent.   You can file a joint return even if one spouse had little or no income.

When you file a joint return, you and your spouse will get the married filing jointly standard deduction of $27,700 (+$1500 for each spouse 65 or older)  You are eligible for more credits including education credits, earned income credit, child and dependent care credit, and a larger income limit to receive the child tax credit. 

[DMarkM1]

Sounds like you are married and living together.  Typically you should file as Married Filing Joint assuming you have a requirement to file. Generally, if your total income does not exceed the standard deduction for your filing status you do not need to file (see below).  See Publication 501 for more details on filing status and requirements. 

You may however want to file to get a refund of taxes withheld.  Filing jointly gives you a higher deduction and better tax rates which typically lowers your tax or increases your refund (see below) whereas filing as separate may disallow some credits or deductions.

Filing jointly   

Both under age 65                              $27,700

65 or older (one spouse)                    $29,200

65 or older (both spouses)                 $30,700

Vs filing separately 

both under age 65                              $13,850

65 or older (one spouse)                   $15,350

65 or older (both)                               $16,850