The tax burden should be minimal - there is currently a 12 million dollar lifetime gift tax exemption (basically your family member can give 12M dollar away without having to pay gift tax) and generally the receiver of the gift does not pay a gift tax or income tax on gift. That being said it is best to get professionals involved as others has stated. Check out https://www.nerdwallet.com/article/taxes/gift-tax-rate#:~:text=In%202022%2C%20you%20can%20give,file%20a%20gift%20tax%20return.