Hi All, can kids lived here in us 158 days ( 5 months and 7 days) can become dependent of that year tax filing, please help What we need to mention 5months or 6 months ?

Unfortunately, No.  There are some exceptions to the six month rule, but they don't seem to apply here.

If your child was born or died during the year and lived with you, your home was the child’s home for the entire time.

Fortunately, this is not the case.

If you don't meet the dependency criteria, certain temporary absences may help you to take the Dependency status.

IRS approved temporary absences generally include:

• Business
• Education
• Illness
• Juvenile detention
• Medical care
• Military service
• Vacation

None of these seem to apply.

Please see footnotes Item (2) Overview of the Rules for Claiming a Dependent.