Benefits without affecting Wife,s Visa

Dear seniors
i hv read all these threads but i am still looking answer of my confusion ,i am sure you gonna make it clear for me as you always do .
i am brit national and my 5 month baby is bri too..but my wife has spouse visa for 2.5 years and has to extend for next 2.5 years next year march..my simple question is which benefits me and my baby is entitled to without affecting my wife,s visa in future?

1: Child Benefit ----
2:WTC/CTC... Every moderator replied for this question that me and my wife has to apply jointly for wtc and ctc..when u say jointly then what does it mean ?will wtc and ctc affect her visa later ?
thanks

1: Child Benefit ----

YOU must claim in YOUR name ONLY. You must however mention your spouse where required in the form.

2:WTC/CTC... Every moderator replied for this question that me and my wife has to apply jointly for wtc and ctc..when u say jointly then what does it mean ?will wtc and ctc affect her visa later ?

You MUST claim in BOTH your names as a couple. If you do not, they treat your claim as a single person and this is fraud as you are not a single person. No effect on her visa.

https://www.gov.uk/government/uploads/s ... _v13.0.pdf