Put back the 16k will do.

just deposit 16k 

Yeah just redeposit RM16k

For example: now I got balance 50K in there,  this year I add in 8K. Balance 58K.

When only I can take out the money in my account for that 50K?

Both husband & wife are still entitled for SSPN tax relief provided the total of both claims don't exceed RM8,000.

Haven't checked the specifics but should be possible. Why would you want to do that though, even if your incomes are identical it always makes sense to 'pack' all deductibles to a single spouse so you can drop bracket. Even more so if one income is higher than the other, all the deductibles should go to that spouse. If its a matter of 'equal sharing' then just calculate the value of the deductible and transfer it between yourselves. Both of you come out ahead.

E.g. if one spouse is taxed at 25% and the other at 19%, putting all deductibles on the higher-earning spouse will net you RM2000. Splitting half would net you RM1760, loss of RM240.