How to save data that is split into multiple tables using records

Certified Senior Developer
Hello Team, can you help me with this here, please?

I have a form (parent record), which relates to more or less 15 different tables (records). 

Most of these tables have a 1-1 relationship with the parent record and, in about 3 of them, the parent record has a 1-N relationship.

Knowing that all these tables are filled in the same form, and everything occurs in the same process. What is the best approach in this case? Thanks

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