Can 1 sibling that is not staying with the parent claim 99% of the Parent Relief of $9k with his sibling that lives with their parent, instead of claiming 100% alone and enjoy relief of only $5.5k?

Sibling A earns less but stays with the parent, whereas sibling B earns more but lives separately.

Assuming both siblings are agreeable, can B claim 99% (S$8,910) and A claim 1% (S$90) to enjoy tax relief of S$9k? If B claims 100% of the parent relief, he/she can only claim S$5.5k relief.