Christmas for married couples

ki

This is my first Christmas being married and I’m confused on how the “gift giving” is suppose to go. How are we suppose to split the cost of gifts? I plan on putting the gifts are from both of us on the tags but are they really? Am i suppose to buy all my family’s gifts and he pays for all his family’s gifts or do we go 50/50 on everything? But we both technically share the same family now that we’re married..