See https://www.irs.gov/instructions/i709#en_US_2023_publink16784xd0e432
Note that you can apply the applicable credit against gift tax since you are residents of the United States.
See https://www.irs.gov/instructions/i709#en_US_2023_publink1000292384
I strongly urge you to seek guidance from local legal counsel and/or a local tax professional.
